Stop looking at your P&L during the trading day.

One change. The number on my account, the running profit and loss, is not visible during the trading day. I cover it. The platform shows it by default and I have configured my workspace to keep it hidden, with an explicit reveal only at end of session. That single change has done more for my decision quality than any indicator I have ever added, removed, or configured.

The reason it works is that the P&L number is not information you can act on. It is information that flips your behaviour into one of two failure modes, depending on whether the number is positive or negative.

If the P&L is red, the brain treats it as a wound that needs closing. The next setup looks like a way to recover. You take it on tighter sizing, or worse, larger sizing. You exit winners earlier because you want the green to materialise. You hold losers longer because closing them locks in the wound. The system you are trading becomes the system you were trading at the moment the P&L turned red, plus a thumb on the scale that you cannot remove.

If the P&L is green, the brain treats it as a fragile object that needs protecting. You exit winners earlier because you do not want to give the gain back. You skip the next setup because taking it might cost you the day's profit. The trades you do take are smaller than your sizing rule says, because you are protecting an existing balance rather than executing a process. By the end of the day the P&L is still green, which feels good, but the green is smaller than it should have been because half your edge was sacrificed to risk-aversion the brain manufactured in real time.

Either way, the P&L number distorts the trade. The trade that was correct on the chart is not the trade you take when the chart is also showing a P&L line that is wagging at you. So I cover the P&L.

The mechanics are simple. In MT5, hide the equity column in the trade panel. In TradingView, do not run the broker integration that shows the live P&L on the chart. Use a sticky note, a piece of cardboard, anything physical, to obscure the part of the screen that displays running profit. If you trade on a multi-monitor setup, put the trading platform on the monitor that does not have the P&L visible at all and only check the other monitor at end of session.

What you should still see is what you need to make the trade. Open positions. Stop levels. Take profit levels. Time on the chart. None of these require knowing your running P&L for the day to be informative. The chart tells you what to do. The P&L tells you how you feel.

The end-of-day reveal is a ritual. After the New York close, I unhide the panel and look at the number. If it is red, I journal what happened. If it is green, I journal what happened. The reveal is the point at which the P&L becomes useful information, because by then there are no more decisions to make today and the number can be analysed without contaminating the next trade.

The behavioural research on this is straightforward. The brain processes losses about twice as intensely as it processes equivalent gains. That asymmetry is built in. There is no version of trader-you that will calmly observe a -2% on the day and then take the next setup with the same equanimity as if the day were flat. There is, however, a version of trader-you that does not see the -2% in the first place, because it is hidden, and therefore takes the next setup based on the chart alone. That trader is more profitable on average. The hidden P&L is what makes that trader possible.

If you have never tried this, try it for one week. Cover the running profit number. Trade your normal system. At the end of each day, reveal it and write down whether the day's actual decisions were any different from what you would have made on a hidden P&L. By the end of the week you will have found that several decisions were different, and most of those differences cost you money. The hidden version is the version that runs the actual edge.

The number will still be there at the close. So will you. The market does not care whether you watched it tick up or down. Your decision quality cares enormously.