Copy Trading: Whose Risk Is It

Michael Whitman · Trading since 2017, full-time since 2020 · Reviewed 2026-09-06

Copy trading links your account to another trader's so their orders are replicated in yours automatically, scaled by a ratio you set. You inherit their entries and exits without inheriting their account size, their risk tolerance or their reasoning, which is why the sizing decision remains yours alone.

How it works

A candlestick chart of the site's shared price history. The headline on the chart reads: Your account mirrors somebody else's trades. — Your account mirrors somebody else's trades. Illustrative chart - not real market data.

Copy trading links your account to somebody else’s and replicates their orders in yours. You pick a trader, set a ratio, and their entries and exits then appear in your account automatically. It is sold as borrowed experience, and it borrows the trades but not the risk management that made them survivable.

A gently rising stretch of the long price series with an account equity curve beneath it. The headline on the chart reads: The platform copies their orders into your account. — The platform copies their orders into your account. Illustrative chart - not real market data.

The platform watches one account and mirrors it into the other at whatever multiple you chose. Nothing after that is a decision you make per trade, which is the feature and the difficulty.

A calmly advancing stretch of the long price series with a slowly rising equity curve beneath it. The headline on the chart reads: But their size is not your size, and that is the problem. — But their size is not your size, and that is the problem. Illustrative chart - not real market data.

Their size is not your size, and this is the central problem. A position reflects their capital, their tolerance for loss and whatever else they hold, none of which the ratio knows about.

Scaled into your account it can be a different fraction of your money entirely. You inherit their trades without inheriting their risk per trade, which is the input that decides most outcomes.

The ranking you picked them from

A flat, quiet stretch of the long price series with a gradually rising equity curve beneath it. The headline on the chart reads: The displayed record is short and selected. — The displayed record is short and selected. Illustrative chart - not real market data.

The record on display is short and it was selected. Rankings measure a window, often a few months, and the top of a large sample of random results looks skilful — a fact about probability rather than about ability.

A strongly rising stretch of the long price series with an account curve that breaches its drawdown limit. The headline on the chart reads: The failed accounts are not on the leaderboard. — The failed accounts are not on the leaderboard. Illustrative chart - not real market data.

The failed accounts are not on the leaderboard. A ranking shows the traders who happened to do well over the window it measures, and the ones who blew up are removed from the list rather than displayed at the bottom.

A choppy, directionless stretch of the long price series. The headline on the chart reads: And they are paid on followers, not on your result. — And they are paid on followers, not on your result. Illustrative chart - not real market data.

Many programmes pay the copied trader on followers or volume, not on your result. That does not make anybody dishonest, but it rewards visible performance over survivable performance, so a strong month on a large drawdown still out-ranks a steadier account.

A declining stretch of the long price series. The headline on the chart reads: Copying teaches you nothing about why. — Copying teaches you nothing about why. Illustrative chart - not real market data.

Copying transfers outcomes and not reasoning. When it stops working there is no way to tell whether the method broke or the market changed, because you never had the method to examine.

In practice

You pay the spread plus a share to everyone involved. Illustrative chart - not real market data.

The cost stack has three layers: the bid-ask spread, any commission, and the share paid to the platform and the copied trader. All three come out whether the trade worked or not, so your result starts below theirs.

A candlestick chart with a volume histogram beneath it, with the volume histogram emphasised. The headline on the chart reads: And many followers at once moves the fill against you. — And many followers at once moves the fill against you. Illustrative chart - not real market data.

The followed trader’s order fills first and yours arrives behind it. Many copied orders arriving together move the price against everyone after the first, and volume decides how much that costs.

A long-horizon candlestick view of the same price series. The headline on the chart reads: A record under a year tells you almost nothing. — A record under a year tells you almost nothing. Illustrative chart - not real market data.

A record under a year tells you almost nothing. Direction runs on this site’s shared history average 2.01 bars across 286 runs, with a longest of 11, so conditions turn over constantly.

A candlestick series containing several opening gaps, with the largest opening gap marked. The headline on the chart reads: A gap hits every copied account simultaneously. — A gap hits every copied account simultaneously. Illustrative chart - not real market data.

An opening gap hits every copied account at the same moment. No trading happened at the level anybody would have exited, so the loss lands on every follower at once.

A declining stretch of the long price series, with the entry price and the level at which a stop would trigger drawn as horizontal lines. The headline on the chart reads: And you cannot put a stop on somebody else's decision. — And you cannot put a stop on somebody else's decision. Illustrative chart - not real market data.

You cannot put a stop loss on somebody else’s decision. You can cap the copy relationship, which closes everything together, but you cannot manage one position they are still holding.

A candlestick chart of the site's shared price history, annotated with the round-trip cost. The headline on the chart reads: Every round trip costs 2% of a bar. — Every round trip costs 2% of a bar. Illustrative chart - not real market data.

Every round trip costs 0.0098 price units on this site’s shared history. That is 2% of a median bar’s range and 45% of the smallest bar, charged at their trading frequency, not yours.

Five numbers to ask for first

Five things are worth demanding before any money is linked to anybody. The length of the record in years rather than months, the deepest drawdown rather than the average one, and the longest run of consecutive losing trades.

Then two that are usually left out. The average holding period, which tells you whether you are copying somebody trading intraday or holding for weeks, and how the trader is paid: on followers, on volume, or on what the people copying them earn.

None of the five is hard to publish. Each is one number the platform already holds, and a ranking leads with the return because it flatters, exactly as choosing a broker rewards asking for the disclosure nobody volunteers. If the platform will not show all five, that is the answer.

What copy trading is not

It is not diversification. Several copied traders holding the same instrument in the same direction is one position wearing several names.

It is not passive. The account is fully exposed throughout and the exposure changes without notice.

It is not a trading mentor. A mentor explains a decision; a copy link only executes one.

It is not free of judgement. Whom to copy and when to stop are the largest decisions, and both stay with you.

When it fails

A sideways, range-bound candlestick series. The headline on the chart reads: In a range the leaderboard rewards the reckless. — In a range the leaderboard rewards the reckless. Illustrative chart - not real market data.

The clearest failure is a trading range. A ranking built on short-window returns hands you whoever took the most risk in a market that punished patience.

The second is the trader changing what they do. Nothing obliges them to keep trading the way they did during the window you measured, and you find out afterwards.

A third is size drift. They raise their own position sizing after a good run and your account follows, when your own capital may not have grown at all.

A fourth is correlation you cannot see. They may be hedging the copied position in an account you cannot see, which leaves you holding one leg of a trade.

A fifth is the stop that never existed. A trader who manages risk by judgement rather than by resting orders leaves your account unprotected, and no published record shows it.

And the fair case, which deserves stating. Copying a small amount to watch how somebody sizes and manages positions is a reasonable way to learn, treated as tuition rather than investment.

The original data

The scan behind this page is research/broker-coverage.json, run over the 31,760 titles in research/search-study-corpus.jsonl. 211 of them discuss win rate and zero discuss risk of ruin; expectancy returns none, Monte Carlo none, and overfitting two at a median of 299 views. A leaderboard is built entirely from the first number and never the second, which is precisely why a six-month unbroken record is not evidence.

A strongly rising stretch of the long price series, cut short at the decision bar. The headline on the chart reads: Six months, no losing week. Copy it? — Six months, no losing week. Copy it? Illustrative chart - not real market data.

research/series-measurements.json, computed by site/measure_series.py, puts 95% of bars on this site’s shared 576-bar history below a prior peak. A curve showing almost no time underwater is therefore not describing an ordinary market experience, and that should raise a question rather than confidence. Set your copy size from your own risk per trade rather than from their position sizes, and treat any record under a year as unmeasured.

Trading signals are the same arrangement with the execution left to you, and the comparison is worth making before paying for either. Risk per trade should set your copy size, because it comes from your account rather than theirs. And why traders lose money covers the failures copying relocates rather than removes.

What I actually do

I understand the appeal completely, because when you are starting out, watching somebody else’s account do the thing you cannot yet do is the most reassuring feeling available. What I found is that copying handed me the trades and none of the judgement, so when a bad run arrived I had no way to decide whether to stay with it or stop. The part worth keeping is watching how somebody sizes and manages a position, which you can learn from without handing over the decision. The part that never transfers is the reason they took the trade at all.

— Michael Whitman

This page is educational, not financial advice. Test every idea on your own charts before risking money.