Best Copy Trading platforms and apps: how to choose the right one

Copy trading looks simple when you only see the button. Pick a trader, set an amount, copy the move. Clean, fast, almost too easy. The real decision is harder. The platform decides what data you see, how much control you keep, what fees affect your result, how quickly trades execute and how easily you can manage risk when the market stops being cute.

That is why the best copy trading platform is not always the one with the loudest leaderboard. A crypto trader, a forex user, a passive investor, a mobile-first user and a prediction market trader do not need the same setup. One person may need a simple copy trading app. Another may need deep trader stats, open position data, drawdown history, custom allocation and advanced order controls.

The basic concept is already covered in what copy trading is, so this guide does not repeat the same beginner explanation. The focus here is choosing the right copy trading platform or copy trading app, comparing the main platform types, reading trader data, checking risk and understanding which setup actually fits the way you trade.

Quick answer: best Copy Trading platforms by user type

There is no universal best platform for copy trading. The right choice depends on the market, the user’s risk tolerance, the level of control they want and how much context they need before following someone else’s position. A platform that works well for slow portfolio copying may feel useless for fast crypto or event-based markets.

The smarter approach is to start with the user type. Before looking at any top copy trading platform list, it helps to understand what kind of trading experience the platform is supposed to support.

The table shows why broad keywords like “best copy trading platform” can be misleading. Best for what? Copying long-term investors is not the same as copying leveraged crypto trades. Copying prediction market positions is not the same as copying forex entries. The market defines the tool.

Copy Trading platform vs Copy Trading app: what’s the difference?

A copy trading platform is the broader environment where users find traders, compare performance, allocate capital, manage risk and monitor copied positions. It can include a web dashboard, analytics, trader marketplace, broker or exchange infrastructure, risk settings, filters and performance history. A platform usually gives more depth, but it can also feel heavier.

A copy trading app is the mobile-first version of the experience. It focuses on fast access, alerts, simple onboarding and quick position management. That is useful for people who trade from their phones, but a smooth interface can also hide important details. If the app makes copying easy but hides drawdown, leverage, open positions or fees, the convenience becomes part of the risk.

The best copy trading app is not the one that makes copying feel effortless. It is the one that makes the important tradeoffs visible. A user should understand who they are copying, what market that trader trades, how much risk they take and how quickly the copied position can be stopped.

Best Copy Trading platforms and apps to consider

Most ranking articles treat every copy trading platform as if it solves the same problem. That is not how the category works. eToro, ZuluTrade, forex brokers, MetaTrader signals, crypto exchanges and prediction market tools all sit under the copy trading umbrella, but they serve different users.

A stronger way to compare platforms is to look at practical criteria: best use case, market coverage, trader transparency, risk controls, fees, execution, app quality and potential drawbacks. That gives users a real decision framework instead of a random list of names.

eToro: best known social Copy Trading platform

eToro is one of the most recognizable names in social copy trading. Its strength is accessibility. Users can browse investor profiles, review performance, follow market activity and copy selected investors through a relatively simple interface. For people who want a familiar social investing experience, that can be useful.

The platform works well for users who want copy trading to feel less technical. It is not only about execution. It is also about discovery, profiles, social proof and a cleaner user journey. That makes it one of the most visible names when people search for the best copy trading app or the best platform for copy trading.

The limitation is that availability, supported assets, fees and product rules can vary by region. A platform can rank well globally and still be less suitable for a specific user depending on country, account type or market access. That is why the brand name alone should never be the full answer.

ZuluTrade: best for Social Trading and leader discovery

ZuluTrade is more focused on leader discovery and strategy comparison. It gives users a marketplace-like environment where they can browse traders, review performance, use filters and evaluate risk before copying. This type of setup is useful for users who want more control over who they follow.

The appeal is in the depth of choice. A user can compare traders by performance, risk score, trading behavior and historical results. That matters because copy trading is not only about finding a profitable trader. It is about finding someone whose strategy can survive bad periods without taking reckless risk.

The drawback is that more choice also means more responsibility. Users need to check drawdown, open positions, consistency and trading style. A trader with attractive returns may still be a poor fit if those returns came from high leverage, one lucky market cycle or unstable behavior.

Forex and CFD Copy Trading platforms: best for traditional traders

Forex and CFD copy trading platforms usually fit users who already understand traditional trading products. This category includes brokers and broker-connected tools where users can copy traders through built-in systems, third-party platforms or MetaTrader-style integrations. Here, execution quality, regulation, spreads and broker reliability matter a lot.

For experienced forex users, this category can be powerful. The market is liquid, the infrastructure is mature and many platforms offer detailed strategy data. Users can combine manual trading, signals and copy trading inside one broader trading setup.

For less experienced users, the same category can feel complicated. Forex and CFDs can involve leverage, fast price movement and products that are not always easy to understand. A top copy trading platform in this niche should not only show returns. It should explain the risk structure clearly.

MetaTrader Signals: best for MT4 and MT5 users

MetaTrader signals are useful for people already trading on MT4 or MT5. The ecosystem has many signal providers, different strategy styles and a setup that fits users who already understand trading terminals, spreads, lots and broker-side execution.

The upside is flexibility. Users can subscribe to signals and copy trading activity inside a familiar trading environment. Advanced users may prefer this because they can combine copy trading with their own analysis and account settings.

The downside is the learning curve. MetaTrader is not the cleanest route for a mobile-first user who wants a simple copy trading app. Signal quality varies, and users still need to analyze the provider before copying. The system gives access, but it does not remove the need for judgment.

Crypto Copy Trading platforms: best for crypto-native traders

Crypto copy trading platforms are built for users who want to follow traders across spot or derivatives markets. They often live inside exchanges or crypto-native trading apps. This category is attractive because crypto trades 24/7, moves quickly and gives users access to BTC, ETH, altcoins and leveraged products.

The risk is that crypto copy trading can look cleaner than it really is. A trader may show strong PnL while using leverage, holding large open positions or concentrating exposure in volatile assets. Funding fees, liquidation risk, slippage and thin liquidity can all change the final result.

A serious crypto copy trading platform should show more than win rate. Users need leverage, drawdown, realized PnL, unrealized PnL, open positions, average holding time and asset concentration. If a copy trading app hides those details, it may be easy to use, but it is not easy to trust.

Sides: best for Prediction Market trading inside telegram

Sides belongs to a different category. It is a Telegram-native prediction markets trading bot that gives users fast access to Polymarket-style markets without forcing them to jump between apps, tabs and dashboards. That matters because event-based markets can move quickly when new information hits.

The Sides use case makes the most sense when the user understands what prediction markets are: markets where people trade on event outcomes and the price reflects changing expectations. That can include politics, crypto events, sports, macro, business, culture and other real-world questions.

Prediction market trading is not the same as copying a forex or crypto chart trader. The trader’s edge can come from news interpretation, odds movement, timing, liquidity and market rules. Sides fits users who want a faster, chat-native way to follow market movement and trade event-based outcomes inside Telegram.

Comparison table: best Copy Trading platforms by key features

A useful comparison should not ask only which platform is popular. It should ask what the platform is built for. Some products are built for social investing. Some are designed for forex and CFDs. Some focus on crypto. Some, like Sides, fit event-based trading and prediction markets.

The table below compares platform categories by user fit and feature type.

The best platform for copy trading is usually the one that shows enough information before the user copies anyone. A leaderboard is helpful, but it is not enough. Users need context, controls and a way to understand whether a trader’s performance came from skill, luck, leverage or one unusual market phase.

How to choose the best Copy Trading platform

Choosing the best copy trading platform should start with the market, not the marketing page. A user who wants to copy long-term stock investors needs a different product from someone copying crypto derivatives traders. A prediction market trader needs something different again because event-based markets move around news, probabilities and rules.

The right platform should answer three questions clearly: what can I trade, who can I copy and how much risk can I control? When those answers are vague, users often end up copying performance screenshots instead of real strategies.

Start with the market you want to trade

Every market has its own copy trading logic. Forex copy trading depends on spreads, leverage, execution and broker reliability. Crypto copy trading adds 24/7 volatility, funding rates and liquidation risk. Stock or ETF copy investing may move slower, but users still need to understand fees and portfolio concentration.

Prediction markets have another rhythm. Users are not only reading charts. They are reading probabilities, news, market rules and crowd expectations. A trader can be correct about an outcome and still make a weak trade if the entry price is bad.

This is why broad phrases like “best copy trading platform” need a second question: best for which market? Before comparing apps, decide whether the goal is crypto, forex, stocks, prediction markets or a mix.

Check regulation and country availability

Availability matters more than many reviews admit. Some platforms are restricted in certain countries. Some assets are available in one region and not another. Some products can be used globally, but with different rules depending on local regulation.

For broker-based copy trading, regulation and fund protection matter. For crypto copy trading, users need to understand exchange risk, leverage rules, withdrawal conditions and product limitations. For prediction markets, market access and local rules can also shape the experience.

This is especially important for US users. Trading products, derivatives, prediction markets and event contracts can face stricter rules depending on the platform and product design. The broader context around prediction market regulation in the US matters because regulation can affect which markets, tools and features users can actually access.

Look at trader transparency

A good copy trading platform should help users understand how a trader makes money, not just show that they made money. Return alone is not enough. Users need full trading history, realized PnL, unrealized PnL, win rate, max drawdown, assets traded, open positions, leverage, average holding time and consistency over time.

Trader transparency matters even more when the app is clean and simple. Simple design should not mean shallow data. A user may not understand every metric at first, but the platform should still make risk visible.

One useful rule is to avoid copying traders whose performance cannot be explained. A stable strategy may have losing weeks, but the logic should be readable. Extreme leverage, hidden open positions or suspiciously smooth returns should make users pause.

Compare fees and hidden costs

Fees can make a strong-looking strategy much weaker. Users often look at trader performance and forget the costs underneath it. Depending on the platform, those costs may include spreads, trading fees, performance fees, withdrawal fees, subscription fees, funding fees, slippage and copy trading markup.

Crypto users should pay extra attention to funding fees and slippage. Forex users should check spreads and execution. Prediction market users should watch entry price, liquidity and order execution. The cost is not always displayed as one simple number.

A strong copy trading app should make costs understandable before the user allocates capital. If fees are hard to find, that is part of the risk profile.

Evaluate risk management tools

The best copy trading app is not the one that makes copying easiest. It is the one that makes risk easier to control. Useful tools include stop-loss, take-profit, max allocation, copy ratio, pause copying, close all copied positions, exposure limits, max loss limits and alerts.

Risk tools should be easy to find and easy to change. A user should not need to dig through multiple screens to stop copying a trader or reduce exposure. When markets move fast, slow controls can become expensive.

This is where mobile-first and chat-native experiences can matter. Fast access is not only a UX feature. In news-driven or volatile markets, the ability to react quickly can affect the result.

Test the user experience

User experience is not only about design. A good copy trading platform should make onboarding, deposits, withdrawals, trader discovery, position tracking and risk editing clear. The user should understand what happens after pressing copy and what can be changed later.

A small allocation test can reveal more than a landing page. Users can see how copied trades appear, how notifications work, how fees show up and how easy it is to stop or edit a copied position.

For advanced users, the dashboard matters more. They need filters, deeper stats, exposure breakdown and detailed performance history. A platform should not force every user into the same shallow interface.

Check educational support and market context

A platform should give users context, not just buttons. Useful support can include guides, glossaries, AI summaries, market explainers, risk notes, trader profile breakdowns and simple examples of how copied trades behave.

This is especially important in prediction markets. A user needs to understand probability, odds, event contracts and resolution rules. A market may look simple, but a small detail in the wording can change the trade completely.

That is why what an event contract in trading is becomes practical, not academic. In event-based markets, users trade a defined outcome with specific rules, pricing and settlement logic. Copying a trader without understanding the contract behind the trade can turn a simple-looking position into a bad decision.

How to choose a trader to copy

A platform gives access. The trader you copy determines most of the risk. Many users search for the best copy trading platform, but the more important decision comes after that: who gets copied, why they get copied and how much capital follows them.

The best trader to copy is not always the one with the highest return. A trader with moderate returns, visible history and controlled drawdown can be healthier than someone showing explosive PnL with unstable behavior. The goal is not to follow the loudest winner. The goal is to find a strategy that can survive different market conditions.

Do not chase the highest return

High return can come from skill. It can also come from leverage, luck or one unusual market period. A trader who made 300% in a short window may look exciting, but the same style may also create large losses when the market changes.

A better approach is to compare returns with drawdown, trading frequency, open exposure and time horizon. A trader with lower but steadier returns may be easier to copy than a trader who swings between big wins and deep losses.

In prediction markets, this logic is sharper. A trader may make money by finding mispriced odds before the crowd adjusts. That is not the same as simply being right about an outcome. Understanding how betting odds work gives better context for why entry price, implied probability and payout matter.

Check maximum drawdown

Maximum drawdown shows how far a strategy has fallen from its peak. It is one of the most important copy trading metrics because it tells users what kind of downside the strategy has already shown. A high return with a high drawdown can be much riskier than it looks.

Many users focus on profit first and drawdown second. That is backwards. Drawdown tells you whether you can emotionally and financially stay with the strategy during a bad period.

A strong copy trading platform should make drawdown visible. Without it, users only see the attractive part of the story.

Study the time horizon

Different traders work on different time horizons. Some scalp short moves. Some hold positions for days or weeks. Some trade long-term portfolios. Some prediction market traders hold until a major update or event resolution.

A short-term trader may open and close positions quickly. A long-term trader may sit through volatility. An event-driven trader may wait for new information. The user needs to know whether that rhythm matches their own expectations.

This is why average holding time matters. Two traders with the same return can feel completely different to copy if one trades ten times a day and the other trades twice a month.

Look at open positions

Closed trade history can be misleading. A trader may show a strong record while holding large losing positions that have not been closed yet. That is why open positions and unrealized PnL matter.

A transparent copy trading platform should show current exposure. Users need to know whether a trader is carrying hidden risk, doubling down after losses or concentrating too much capital in one market.

This is especially relevant in crypto and prediction markets, where conditions can change quickly. A trade that looked fine yesterday may become dangerous after one news update, one liquidation wave or one rule clarification.

Check market specialization

A trader can be strong in one market and weak in another. A crypto trader may understand BTC and ETH but lose discipline in low-cap assets. A forex trader may specialize in major pairs and struggle outside that lane. A prediction market trader may be sharp in politics but weak in sports.

Specialization matters because copy trading is not only about performance. It is about repeatable edge. Users should look for traders who have a clear market focus and a style that makes sense.

In event-based markets, that difference becomes even more visible. Prediction markets vs sports betting is a useful comparison because it shows why trading probabilities, managing entry prices and reading market structure is not the same as placing a simple bet on a favorite team.

Watch behavior, not just metrics

Metrics are useful, but behavior tells the deeper story. Does the trader increase size after losses? Do they suddenly use more leverage? Do they change strategy too often? Do they concentrate everything in one asset or one event? Do they hold losing trades for too long?

A trader with imperfect metrics but consistent behavior may be safer than a trader with impressive returns and chaotic decisions. Copy trading is easier when the person being copied behaves predictably.

The best copy trading platforms help users spot these patterns. They do not only rank traders by return. They show enough data to understand risk habits.

Crypto Copy Trading: what makes it different?

Crypto copy trading is faster and often riskier than traditional copy investing. Markets run 24/7, volatility can spike without warning and many traders use leverage. A strategy that looks profitable in calm conditions may behave very differently during a liquidation cascade, exchange incident or major news event.

The best crypto copy trading platform should show more than returns. Users need leverage data, liquidation risk, funding fees, open positions, asset concentration, realized PnL, unrealized PnL and max drawdown. Without those metrics, crypto copy trading becomes guesswork with a nice interface.

Crypto users should also be careful with traders who constantly rotate into hype-driven assets. A trader may perform well during a bullish period and then fail when liquidity dries up. Market regime matters. A strategy built for momentum may not work in sideways or bearish conditions.

Key metrics for crypto Copy Trading

The most useful metrics include realized PnL, unrealized PnL, max drawdown, leverage, liquidation history, average position size, asset concentration, win rate by market condition, funding fees and copy slippage.

Execution quality also matters. Copying a crypto trader late, at a worse price or with more slippage can reduce returns even when the original trader performs well. That gap between leader performance and copier performance is one of the most overlooked risks in copy trading.

A top copy trading platform in crypto should make this gap visible. Users should know whether they are receiving similar execution to the trader they follow or a weaker version of the same strategy.

Prediction Market Copy Trading: a new category to watch

Prediction market copy trading is a newer category because the thing being copied is different. In forex or crypto, users often copy price-based strategies. In prediction markets, users copy judgment around event outcomes, probability, timing and price. The trade is not just “market goes up or down.” It is “this outcome is more or less likely than the market currently believes.”

That changes the skill set. A good prediction market trader may understand news flow, public sentiment, resolution criteria, liquidity and implied probability. They may not trade often, but when they do, the edge can come from better information or better timing.

The mechanics also matter. How prediction markets work explains why prices move as new information changes the market’s view of an event. For copy trading, this means users are not only copying a position. They are copying someone’s interpretation of probability, timing and market price.

Why Prediction Markets need a different Copy Trading lens

Prediction markets are built around event contracts. Prices move as new information changes the probability of an outcome. A trader can enter too late, overpay for a popular side or misunderstand the market rules. In that case, even a correct opinion can become a poor trade.

Odds literacy matters here. Users need to understand how different odds formats express probability and payout. A clear grasp of what odds formats in betting mean helps connect decimal, fractional, American and probability-style pricing to how event markets are read.

The strongest prediction market traders do not only ask, “Will this happen?” They ask, “Is the current price wrong?” That is a pricing question, not just an opinion question.

Where Sides fits

Sides brings prediction market trading into Telegram, where many users already follow news, discuss markets and react to updates. Instead of switching between tabs, users can access Polymarket-style markets inside a chat-native experience.

This matters because prediction market trading is often time-sensitive. A speech, injury report, court decision, product launch, crypto event or macro update can change odds quickly. Having AI summaries, market access and order tools closer to the conversation can reduce friction.

Sides is not trying to be another forex or stock copy trading platform. It fits a newer category: event-based trading inside Telegram, with tools built around fast context, market movement and user-friendly execution.

Copy Trading vs Social Trading vs Mirror Trading vs Signal Trading

Copy trading is often grouped with social trading, mirror trading and signal trading, but they are not the same thing. The difference matters because each model gives the user a different level of control.

In copy trading, another trader’s positions are copied automatically according to the user’s settings. In social trading, users may follow ideas and discussions but still place trades manually. Mirror trading usually follows a fixed strategy or system. Signal trading sends alerts, while the user decides whether to act.

Many platforms mix these models. A copy trading app may include social feeds. A broker may offer signals and automatic copying. A prediction market tool may combine market summaries, trader discovery and manual order controls. The label matters less than what actually happens when the user follows a trade.

Is Copy Trading profitable?

Copy trading can be profitable, but it is not automatically profitable. The result depends on trader selection, fees, market conditions, timing, execution and risk management. A good trader can still lose. A good platform can still be used badly. A strong historical return can still break in a new market regime.

Users should treat copy trading as exposure to a strategy, not passive income. That mindset makes the process healthier. You are not outsourcing risk. You are choosing which risk to follow and how much capital to allocate to it.

The same logic applies to prediction markets. Profit does not come from simply guessing outcomes. It comes from finding prices that are wrong, entering at the right time and managing exposure. That is why arbitrage on prediction markets is a useful concept: it shows how traders think about pricing gaps, not just opinions.

What can hurt profitability

Fees can reduce returns. Slippage can make copied entries worse than the original trader’s entry. Late copying can change the risk-reward profile. High leverage can turn a normal loss into a painful one. Poor risk settings can leave users exposed longer than they intended.

Copying after a hot streak is another common problem. Many users discover a trader only after the best period has already happened. They enter when the strategy is crowded or when market conditions are about to change.

No diversification also hurts. Copying one trader, one asset or one market can create concentration risk. Even a good trader can have a bad month.

What can improve the odds

The healthier approach is to use controlled allocations, clear risk caps, consistent trader selection criteria and regular monitoring. Users should compare drawdown, open positions, fees, market specialization and behavior before copying.

It also helps to understand the market being traded. Copying crypto without understanding leverage is risky. Copying forex without understanding spreads is risky. Copying prediction market trades without understanding probability and resolution rules is risky.

Copy trading works best when automation is combined with judgment. The platform can copy trades, but the user still needs to choose carefully.

Common Copy Trading mistakes

The most common mistake is copying the highest-return trader without reading the risk behind the return. Big numbers attract attention, but they do not explain the strategy. A trader may have used leverage, concentrated exposure or simply benefited from one lucky market cycle.

Another mistake is allocating too much capital too early. Copy trading is easier to scale up than to recover from a large early loss. Starting small gives the user time to understand how the trader behaves, how the platform executes trades and how fees affect results.

Users also often ignore open positions. A closed trade history may look clean while current exposure is ugly. The best copy trading platforms make this visible, but users still need to check it.

Other common mistakes include copying too many traders at once, ignoring fees, following strategies that do not match personal risk tolerance, copying during major news events without context and treating copy trading as guaranteed income.

Best Copy Trading platform for different goals

A good article about the best copy trading platform should not end with one winner. Different users need different tools. A crypto trader needs execution and leverage transparency. A passive investor needs clear portfolio exposure. A prediction market user needs speed, context and odds awareness.

The platform should match the goal. Choosing a tool built for another user type can create friction, confusion and unnecessary risk.

Best for crypto traders

Crypto traders need liquidity, leverage visibility, funding fee transparency, risk controls and reliable execution. They should avoid platforms that show only headline profit without explaining how the trader achieved it.

A strong crypto copy trading platform should show open positions, asset concentration and liquidation risk. Without those details, users may end up copying hidden leverage.

Best for Prediction Market traders

Prediction market traders need fast market access, event summaries, odds movement, market rules and flexible order tools. Since event prices can move around news, the interface should reduce friction and make context easy to reach.

This is where Sides has a natural fit. It brings prediction market trading into Telegram and supports a workflow built around speed, context and market movement.

Best for passive investors

Passive investors usually need long-term strategies, diversified portfolios, clear fees and stable performance history. They may not need advanced order tools, but they still need transparency and risk limits.

For this user type, the best copy trading platform is usually one that makes portfolio exposure easy to understand. Too much short-term trading may not fit their goals.

Best for advanced traders

Advanced users need deeper analytics, custom copy ratios, automation, filters, integrations and detailed performance breakdowns. They may care less about basic education and more about execution, data depth and control.

For them, the best platform is the one that does not hide complexity. They need access to the details that less technical users may skip.

Best for mobile-first users

Mobile-first users need fast access, alerts, clean order management and an interface that does not slow them down. A good copy trading app should make it easy to check performance, adjust allocation and stop copying without opening a full desktop dashboard.

That said, mobile-first should not mean data-light. The app still needs to show fees, open exposure, risk metrics and trader behavior. Speed is useful only when the user still has enough information to make a good decision.

Safety checklist before you copy any trader

Before copying anyone, users should slow down and check the basics. The goal is not to remove all risk. That is impossible. The goal is to avoid obvious mistakes before capital is allocated.

A simple checklist can prevent many bad decisions:

• Does the trader have enough history?
• Is the return consistent or based on one spike?
• What is the max drawdown?
• Are open positions visible?
• Does the trader use leverage?
• What assets or markets does the trader trade?
• How often do they trade?
• Is their strategy understandable?
• What fees will you pay?
• Can you stop copying instantly?
• Can you set max loss?
• Are you comfortable losing the allocated amount?

For prediction market users, one more question belongs on the list: do you understand the event and the price? A trader may be smart, but copying a position without understanding the market rules can still create bad decisions.

In event markets, even the way the price is written can change how users think about risk. Knowing how to read moneyline odds helps translate a price into implied probability, which makes it easier to understand what a trader is actually paying for a position.

Final verdict: the best Copy Trading platform depends on what you trade

The best copy trading platform is not universal. eToro-style platforms can be useful for social investing. ZuluTrade-style platforms are strong for leader discovery. Forex and CFD brokers can work for experienced traditional traders. Crypto copy trading platforms serve crypto-native users, but require stronger risk awareness.

Prediction market tools like Sides are emerging for a different kind of user: someone who wants event-based trading, faster context and easier access through Telegram. This is not the same category as a standard forex or stock copy trading app. It is built around markets where news, probability and timing matter.

A good platform should help users copy with more control, not less thought. The right choice is the one that matches your market, your risk tolerance, your experience level and the amount of control you want to keep.

For users who want to trade prediction markets without jumping between tabs, Sides brings Polymarket-style trading into Telegram with fast access, advanced order tools, AI summaries and a simpler way to follow market moves.

Further Reading

• What Copy Trading is
• What Prediction Markets are
• How Prediction Markets work
• What an event contract in trading is
• How betting odds work
• How to read moneyline odds
• What odds formats in betting mean
• Prediction Markets vs sports betting
• Prediction Market regulation in the US
• Arbitrage on Prediction Markets