The signature: do you add to losers or to winners?
The measurement is simple: in your record, count how often you added to a losing position against how often you added to a winning one. If the first is clearly larger, your decisions follow the loss already taken rather than the opportunity that remains.
And the question that exposes it immediately: if I were not already in this trade, would I enter it at this price now? If the answer is no, you are staying because of what you paid rather than what you expect — which is the fallacy exactly.
Why adding is more dangerous than it looks
Adding to a loser is presented as "improving the average price", which is arithmetically true and practically misleading: the average improved, but position size doubled and the distance to the stop-out collapsed.
You increased exposure in the direction the market has so far shown you were wrong about, while shrinking the room you can survive. That is the path that turns a bounded loss into a liquidation — compute it exactly in the liquidation distance calculator.
Why advice fails, and what works instead
A bias is not fixed by advice, because in the moment it does not feel like a bias — it feels like a sound decision based on a correct reading. This is why "be disciplined" and "control your emotions" change nothing: they ask you to notice what is designed not to be noticed.
The practical alternative is for each bias to have a measurable signature in your trade record: a number you compute yourself that confirms or rules it out. This family uses the same reference account as the other risk pages — $1,000 risking 1%, or $10 a trade — so every example is directly comparable.
The limits of these pages are explicit: they describe trading behaviour and decisions, not a psychological state and not a medical diagnosis.
A worked example
On the reference account at 1:500: buy 0.10 lots of gold at 2,400, with liquidation at 2,302.40 — $97.60 of room.
Price falls to 2,350 and you add another 0.10 lots "to improve the average". Size is now 0.20 lots and held margin has doubled, lifting liquidation to 2,327.38 — so the room remaining from the current price shrank from $47.60 to $22.63.
Your average price genuinely improved, and your room to survive fell to under half. That is the trade-off nobody mentions when adding is described as "improving".
Common mistakes with this term
- Adding to a loser to improve the average, while the distance to liquidation collapses.
- Measuring the decision by what has been lost so far rather than by what is expected from here.
- Confusing a planned scaled entry with an emotional addition after a loss.