Revenge trading has a price, and you can calculate it

Every trader has been told not to revenge trade. Almost none of them know what it costs.

This is the problem with behavioural advice in trading: it is correct, it is universal, and it is completely inert. Nobody changes a habit because a stranger told them it was a bad habit. They change it when they see the bill.

Defining it precisely enough to count

"Revenge trading" is too vague to measure, so it needs an operational definition. A reasonable one:

A trade opened within 30 minutes of closing a loss, at more than 1.25× your usual position size.

Both conditions matter. Taking the next setup promptly after a loss is not revenge trading — it is trading. The size is what marks it: the intention to get the money back faster than you lost it.

You can tighten or loosen the window and the multiple. What matters is that the definition is mechanical, so the count is a fact rather than a feeling.

Pricing it honestly

The temptation is to add up the full loss on every revenge trade and call that the cost. That overstates it, and traders can tell — which is exactly how a useful number gets dismissed.

Two fairer approaches:

The whole trade. A revenge trade is one you would not otherwise have taken, so its entire result is attributable. This is defensible for revenge specifically, because the trade exists only because of the habit.

The excess beyond 1R. For habits like holding a loser too long or widening a stop, the trade was going to happen anyway — what the habit caused is the damage beyond a clean stop-out. Charging the full loss would overstate it.

Alpha Ledger uses the first for revenge trading and the second for the discipline habits, because the counterfactual is different in each case.

The what-if

The number that actually changes behaviour is not the cost. It is the counterfactual:

Without those 19 trades, this period would be +$10,180 instead of +$5,544.

That sentence does something the advice never does. It converts an abstract failing into a specific, checkable amount of money that you can decide whether you want.

The rule that fixes it

Once you have the number, the intervention is boring and mechanical:

After any loss, no new position for 30 minutes.

Not "trade more carefully". Not "be disciplined". A timer. Willpower is a renewable resource that runs out precisely when you need it most — right after a loss — which is why the rule has to work without it.

Set the timer, close the platform, walk away from the desk. Whatever you were about to take will still be there in half an hour, or it will not, and either way you will be better off.