Ask a trader six months into a burnout stretch when their results started sliding and they'll usually point to the wrong week. The slide didn't start when the losses did. It started weeks earlier, when sleep got shorter, sessions got longer, and the breaks disappeared, and the losses were just the point where the depletion finally showed up on the P&L line instead of just in how the trader felt.
Cognitive fatigue looks like a strategy problem
Decision quality degrades in ways that mimic a broken edge. A tired trader hesitates on entries that used to be automatic, holds losers a little longer because evaluating the exit takes energy that isn't there, and starts taking marginal setups because focus has narrowed and everything on the chart looks similar. None of that shows up as exhaustion in the journal. It shows up as the edge stopped working, and traders who chase that misdiagnosis often try to fix depletion with a new strategy, which doesn't touch the actual problem.
The signs, before the account shows them
Fatigue has tells that arrive before the P&L does: re-reading the same candle three times without absorbing it, irritability at a normal stop-out that wouldn't have bothered you a month ago, dreading the session instead of being neutral about it, and screen time creeping up while decision quality creeps down, the two moving in opposite directions on the same chart. Any one of these showing up for more than a few days in a row is worth treating as a signal, not a mood to push through.
Structure the session for recovery, not just output
Fewer hours at the screen with full attention beats more hours with half of it. Two focused hours around a session open, with the pre-session routine and a hard stop time, outperforms a six-hour vigil in almost every trader's own journal, once they actually check. Build recovery into the week the same way an athlete would: a genuinely off day where you don't look at charts at all, not a lighter trading day, an actual off day, and treat it as part of the training rather than a concession to weakness.
Rest is a performance input, not a reward
The instinct after a rough month is to trade more to make it back. The traders who last treat a rough month as a signal to trade less and sleep more, because the rough month is frequently a symptom of depletion rather than a strategy failure, and adding hours to a depleted state adds fuel to the actual cause. Sleep has a large, documented effect on risk judgment: traders operating on under six hours make measurably worse sizing and exit decisions than the same traders rested, on the identical setups. A career in trading is closer to a marathon paced from the first mile than a string of all-out sprints.