Average Loser
Definition
Average loser is your mean loss across all losing trades in a given period — it's the number that tells you whether your losers are staying controlled or quietly getting out of hand.
Example
“My average loser crept from $45 to $90 over three weeks. I hadn't changed my stop levels on paper, but I was letting trades run against me before pulling the trigger.”
Detailed Explanation
Tracking average loser is one of the most honest things you can do as a trader. A lot of people focus on win rate, but if your average loss is quietly growing — because you're holding past stops, moving stops, or sizing up on impulsive trades — it will erode a perfectly good strategy without being obvious. The average loser number doesn't lie.
What you want to see is an average loser that's consistent and smaller than your average winner. The exact ratio depends on your strategy, but if your average loss starts closing the gap with your average win, your edge is disappearing. Compare the two numbers monthly, not just annually — catching the drift early is much easier than recovering from a blown account later.
The most common reason average loser grows is emotional: traders hold losers a little longer each time, hoping the trade comes back, or they widen stops to avoid getting stopped out in normal volatility. The fix isn't psychological willpower — it's mechanical. Pre-define stops before entering, and use hard stop orders rather than mental stops so the decision is already made.