PnL Ledger

Why traders lose money to predictable brain quirks If your P&L ever felt like it was fighting an invisible current, you’ve met your cognitive biases. Two of the most expensive for day traders are loss aversion and recency bias. Loss aversion comes from prospect theory: we feel the pain of losing more intensely than we

What these rules are and why they matter A daily loss limit is a hard stop on how much you allow yourself to lose in a single session. A weekly max drawdown rule is the same idea stretched across five trading days: if your equity falls by that amount from the week’s starting balance or

Why this table matters in real trading When traders discuss good win rates or solid risk:reward (R:R), they often treat them as separate dials. They aren’t. For any planned trade you can compute the minimum win rate needed to avoid losing money at a given risk:reward. That minimum is the break-even win rate, and it

What R-multiples are and why they matter If you risk €100 on a trade and make €300, that outcome is +3R. If you lose €50 on a trade that had €100 at risk, that’s -0.5R. R is simply your initial risk per trade, and an R-multiple expresses every result in units of that risk. The

To read your strategy honestly, you need three lenses: win rate (the percentage of winning trades), payoff ratio (average win divided by average loss), and profit factor (gross profit divided by gross loss). Day traders often talk about win rate as if it were a badge of honor, but a high hit rate can hide

What max drawdown actually measures Max drawdown is the single worst peak-to-trough fall in your equity before a new high is made. Think of your equity curve as a coastline with rising tides, drawdown is how far the water recedes from the latest high-water mark, and maximum drawdown (MDD) is the deepest retreat seen over