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After deciding to buy, attention shifts. Bullish signals leap out. Bearish ones fade. The mind builds a case for the existing position.

This is confirmation bias, the tendency to favour information that supports a prior belief. In trading it shows up as selective reading of indicators, news and price action.

A trader long EURUSD sees a bullish candle on the 5 minute chart and ignores a bearish divergence on the 15 minute. A dovish comment from the central bank gets a prominent place in the story, while hawkish data stays in the background.

Countermeasures exist. Writing the invalidation condition in advance forces the mind to define what would prove the idea wrong. Asking "what would a trader on the other side be seeing?" widens the view.

Pre-trade checklists with fixed criteria reduce room for selective perception.

Reviewing screenshots from entry time, with all timeframes visible, often reveals the signals that were ignored.

Has an ignored signal ever been spotted in a post-trade review here?

Yes, and the first time it happened it was almost funny. I was long GBPUSD, completely sure of myself, and in the review I saw a clear lower high on the 15 minute chart that I had literally drawn a line under the day before. During the trade I simply did not see it, even though it was on the screen the whole time.

What helped me most was writing the exit condition in one line before entering, something like "out if it closes back below the Asian high". It sounds basic, but when I have that written down I stop looking for reasons to stay in. Without it, every small green candle becomes evidence.

I also started doing my weekly review with the higher timeframe chart open first, before I look at my entry. Seeing the bigger picture before I see my own trade stops me from defending it. Around a third of my losing trades over the last two months had a warning on the higher chart that I ignored at the time.