Why you keep losing at trading (even with a good strategy)

You know your setups. Your backtest is profitable. And yet, month after month, your live account bleeds. If that sounds familiar, the problem is almost never your technique: it's the gap between the plan you have and the plan you follow.

The backtest / live-account gap

A backtest is you at 100% discipline. Your live account is you with fear, boredom, revenge and fatigue. That gap has a cost, and it's almost always bigger than you think. The good news: it can be measured.

The four leaks that cost you the most

1. Revenge trading. You re-enter within minutes of a loss, often bigger. It's the most expensive and most repeated leak.
2. FOMO entries. You enter off-plan because "it's leaving without me". No setup, no checklist, just fear of missing out.
3. Oversizing after a loss. You bump the lot to "win it back". One time is enough to erase ten good trades.
4. Trading your worst hour. Most traders have a time window where they lose systematically. They don't know it, because nobody showed them.

Why you don't see it

A classic journal (Excel, Notion) records facts: entry, exit, P&L. It doesn't tell you how much revenge trading cost you this month, or where your account would be if you had followed your plan. You can't fix what you don't measure.

Price the gap, and it closes

The only thing that truly changes behavior is seeing its price. "Revenge trading cost you €480 this month" lands harder than "be more disciplined". That's exactly what TradeDiscipline's diagnostic does: it crosses your behavior with your real P&L, prices every bad habit in euros, and draws the curve your account would have followed if you had stuck to your plan.

Your technique is probably already good enough. It's the execution that costs you. Finally see why you lose, free, no credit card.