Money management in copy trading: percentage of equity or fixed lot?

Two people copying exactly the same channel, taking exactly the same signals, can end the year one in profit and the other wiped out. The difference is not in the signals. It is in position size.

The fixed lot

You decide once and for all: 0.10 lot per trade, whatever the signal. It is simple, predictable, and perfectly legible on a statement.

The flaw shows up the moment signals carry stops at different distances. A 10-pip stop and a 100-pip stop at the same volume are not the same risk: the second is ten times the first. You believe you have constant exposure; you actually have exposure varying tenfold depending on the signal.

The fixed lot stays defensible in one case: a channel whose signals all carry stops of comparable distance. Check it over thirty signals before you decide.

The percentage of equity

You set a risk — 1% of equity, say — and the volume follows from the distance to the stop. Distant stop, small volume. Close stop, larger volume. The maximum loss is the same on every trade, which is exactly the point.

• The volume scales itself as the account grows, with no settings to revisit.
• It also shrinks as the account falls, which slows the spiral instead of feeding it.
• It makes two channels comparable: 1% risk is 1% risk, whichever one the signal came from.

A signal with no stop loss cannot be sized as a percentage. A serious copier should refuse that trade rather than invent a volume.

How much to risk per trade

There is no universally right answer, but there is an arithmetic constraint. At 1% per trade, ten losses in a row cost about 10% of the account. At 5%, the same ten losses cost close to 40%, and you then need to make 66% to get back to where you started.

That asymmetry is what makes large percentages dangerous: the loss is proportional, the recovery is not. Runs of ten losses are not rare on a signal channel, even a good one.

Splitting across take profits

Plenty of signals announce two or three take profits. The common mistake is to open a full position for each: risk is then tripled without you having decided it.

The right approach divides the intended risk by the number of take profits. A 1% risk across three targets is three positions at 0.33% — not three at 1%. You keep the benefit of scaling out without changing your total exposure.

Setting risk channel by channel

If you follow several providers, a single risk figure for all of them assumes you trust them equally. You rarely do. A channel you have followed for two years and one you have been testing for three weeks do not deserve the same exposure.

A per-channel setting — and, where needed, per symbol — lets you test a new provider at 0.25% while your established channels run at 1%. It is the cheapest way to evaluate a channel in real conditions.

The guard rail people forget

No volume setting protects you from a day when a channel goes off the rails. A daily loss target — past which the copier simply stops taking trades — takes a few minutes to configure and saves you explaining, that evening, what happened.