Copy Trading on Polymarket: How to Follow Top Traders with Merlin

Copy trading — automatically replicating the positions of proven traders — is one of the fastest ways to start profiting on Polymarket. The Merlin Telegram bot makes it possible with one click. But choosing the right traders to follow and managing your risk properly is where the real edge lies.

What Is Copy Trading?

Copy trading means automatically mirroring another trader’s positions. When they buy, you buy. When they sell, you sell. The idea is simple: if someone has a proven track record of profitable trading, following their moves should produce similar returns.

On Polymarket, copy trading works particularly well because:

Transparent track records: The Merlin leaderboard shows verified performance data — P&L, ROI, volume, and position history
Binary outcomes: Trades either win or lose, making it easy to evaluate historical performance
Liquid markets: Major markets have enough liquidity that copy trades can execute at similar prices to the original

How the Merlin Telegram Bot Works

The Merlin Telegram bot provides one-click copy trading directly from trader profiles:

Find a trader on the Merlin leaderboard with strong performance metrics
Click “Copy Trade” on their profile page — this generates a deep link to the Telegram bot
Configure your settings in the bot: position sizing, risk limits, and market filters
Receive notifications when the trader opens or closes positions
Positions are replicated in your Polymarket account automatically

The bot URL format is https://t.me/merlin0_bot?start=ct_{wallet} where {wallet} is the trader’s address.

Selecting Traders to Copy

Not every profitable trader is a good copy trading candidate. Here’s what to look for:

Must-Have Criteria

1. Consistent ROI across time periods

Check the trader’s profile for ROI in 24h, 7d, 30d, and all-time periods. You want consistency, not a single lucky streak. A trader with 12% all-time ROI and positive returns in all four periods is more reliable than one with 40% 30-day ROI but negative all-time.

2. Sufficient volume (≥$50K all-time)

Volume is the sample size of trading. A trader with $5,000 in volume and 50% ROI might just be lucky. A trader with $500,000 in volume and 15% ROI has demonstrated repeatable skill. Focus on Dolphin-tier and above — traders with at least $10,000 in volume.

3. High Merlin Trader Score

The Merlin Trader Score (0-100) combines ROI, volume, and consistency into a single metric. Traders scoring 70+ are typically strong copy trading candidates.

Nice-to-Have Criteria

4. S-tier or A-tier ROI Rating

The Merlin ROI Rating provides a quick classification. S-tier (≥20% ROI) and A-tier (10-19.9%) traders have demonstrated significant edge.

5. Active trading

Check the trader’s recent activity. A trader with great historical stats but no trades in the past month may have become inactive. Look for traders with positions in the 24h and 7d leaderboards.

6. Category specialization

Traders who dominate specific category leaderboards often have deeper expertise than generalists. If you’re interested in crypto markets, follow a trader who ranks highly in the crypto category specifically.

7. Insider Score

Traders with high Merlin Insider Scores on the Insiders page consistently profit on low-probability outcomes — suggesting they have genuine information edge, not just luck.

Risk Management for Copy Trading

Copy trading isn’t risk-free. Here’s how to protect your capital:

Diversify Across Traders

Never follow just one trader. Even the best traders have losing streaks. Following 3-5 traders with different styles and category focuses reduces your risk:

Trader 1: High-volume whale, politics specialist
Trader 2: High-ROI shark, crypto focused
Trader 3: Consistent dolphin, diversified across categories
Trader 4: High insider score, event-driven specialist

If one trader has a bad week, the others may compensate.

Set Position Size Limits

Don’t mirror a whale’s position sizes if you have a smaller account. Scale your positions relative to your capital:

Conservative: Limit each copied position to 2-5% of your total capital
Moderate: 5-10% per position
Aggressive: 10-20% per position (only with highly trusted traders)

Define Maximum Exposure

Set a hard limit on total capital allocated to copy trading — typically 30-50% of your Polymarket balance. Keep the rest for your own trades or as a buffer.

Monitor and Adjust

Copy trading isn’t fully passive. Review your copy traders weekly:

Has their ROI trend changed?
Are they trading in unfamiliar categories?
Has their Merlin Trader Score dropped?
Are they taking unusually large or small positions?

If a trader’s performance deteriorates over two or more weeks, consider replacing them with a better-performing alternative from the leaderboard.

Common Copy Trading Mistakes

1. Following Based on One Metric

A trader with the highest 24-hour P&L might just have gotten lucky on a big bet. Always evaluate across multiple metrics and time periods. Use the statistics page to understand what “good” looks like across the leaderboard.

2. Copying Too Many Traders

Following 10+ traders creates portfolio chaos — positions may conflict with each other, and the aggregate effect might just mirror the market. Stick to 3-5 carefully selected traders.

3. Not Accounting for Timing

When you copy a trade, you may execute at a slightly different price than the original trader. In tight markets (major elections, crypto prices), this slippage is minimal. In thin markets, it can significantly impact returns.

4. Ignoring Category Concentration

If all your copy traders are betting on the same markets, you don’t actually have diversification. Check their open positions on their Merlin profiles to ensure you have exposure across different events and categories.

5. Abandoning Too Quickly

Even excellent traders have losing weeks. Evaluate performance over at least 30 days before deciding whether to stop following someone. Short-term losses are normal in prediction markets.

Advanced Copy Trading Strategies

Selective Copying

Rather than copying every trade, use trader activity as a signal and apply your own analysis:

Monitor top traders’ new positions via the Merlin Telegram bot
Research the market before following
Only copy trades where you independently agree with the direction
This gives you the benefit of informed trader signals while maintaining your own analytical discipline

Inverse Copying

If you identify a consistently losing trader (negative all-time ROI with high volume), their positions may actually be a useful contrarian signal. This is an advanced technique with significant risk, but the logic is sound — if someone is reliably wrong, doing the opposite should be reliably right.

Tiered Allocation

Allocate more capital to higher-conviction copy traders:

Tier 1 (60% of copy trading capital): 1-2 traders with 80+ Merlin Trader Score, S-tier ROI, Shark+ volume
Tier 2 (30%): 2-3 traders with strong but shorter track records (high 30-day ROI, rapidly growing volume)
Tier 3 (10%): 1-2 experimental follows — breakout traders you’re testing

Getting Started

Ready to start copy trading? Here’s your action plan:

Visit the Merlin leaderboard and sort by ROI for the all-time period
Click through to trader profiles — review their 90-day equity curves, open positions, and category breakdowns
Identify 3-5 candidates using the selection criteria above
Open the Merlin Telegram bot and configure copy trading for your selected traders
Set position size limits based on your risk tolerance
Review weekly — check trader performance and adjust your follows as needed

Copy trading transforms the Merlin leaderboard from a spectator tool into an active profit engine. By systematically following the most skilled prediction market traders, you gain exposure to their analytical edge while maintaining control over your own risk management.