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Decision Fatigue, Why Your Best Trades Happen Early

Have you noticed that your best analysis happens in the first hour, while your worst trades appear late in the day?

That's decision fatigue. Every choice you make drains mental energy: what to analyze, whether to enter, where to place the stop, when to exit. By the end of a long session, your brain looks for shortcuts, and shortcuts in trading often mean mistakes.

Symptoms:

- Impulsive entries late in the session
- Ignoring your checklist
- Skipping journaling
- Irritability or restlessness

How to reduce fatigue:

1. Trade fewer hours. A focused two-hour window beats an exhausted eight-hour marathon.

2. Prepare before the session. Do your analysis and mark your levels beforehand so you don't decide everything live.

3. Automate what you can. Use alerts, pending orders, and preset lot sizes.

4. Simplify your rules. Fewer pairs, fewer setups, fewer choices.

5. Take breaks. Step away between analysis and execution.

6. Sleep and eat well. Physical health supports mental clarity.

7. Set a hard finish time. When the window closes, so does the platform.

The goal isn't to work harder. It's to make your important decisions when your mind is sharpest and make as few as possible afterward.

Protect your mental energy the way you protect your capital.

A side note on the theory: the idea that willpower drains like a battery (ego depletion) has done poorly in large replication attempts, so I wouldn't lean on the science too heavily. The practical observation still holds for most of us, though. The late trades are worse, whatever the mechanism, and boredom plus hunger plus a red morning probably explain most of it.

Point 2 and point 3 together are what changed things for me. If the stop, target and lot size are decided before the session and the order goes in as a bracket, the only live decision is whether the setup actually formed. That cuts the number of choices per trade from five or six to one.

I also cap the number of trades rather than only the hours. Six trades and the platform closes, even if it's only 10:30. On the days I hit the cap early, the urge to "just look" is strong, and that urge is usually the best sign I needed the stop.

Fairman wrote: Trade fewer hours. A focused two-hour window beats an exhausted eight-hour marathon.

For a London-based trader this has an awkward collision built into the clock. The cleanest hours are usually 7:00 to 10:00, but most US data lands at 13:30 or 15:00, after five or six hours at the screen if you started early. That is exactly when fatigue is doing the most damage, and it's also when the market is moving fastest.

My solution has been to treat them as two separate sessions with a real break in between. Analysis and trading in the London morning, then off the screen for a couple of hours, then a short, planned window around the US releases that matter that day. If nothing important is scheduled in the afternoon, I don't come back.

Your point 2 helps most on news days. If the levels and the plan for each outcome are written down before the number, the decision at 13:30 is just execution.