There is a precise moment when many traders stop seeing the market. It is not when they are distracted, it is not when they are tired. It is exactly when they open a position and the balance starts to move.
\nFrom that moment on, what they are looking at is no longer the price. They are looking at the number. Green or red. In profit or in loss. And that seemingly trivial distinction changes everything: the way they interpret signals, the way they manage risk, the way they decide to exit or stay.
\nThis phenomenon has a name: balance blindness. It is not a metaphor. It is a documented cognitive mechanism that turns the P&L (Profit & Loss, meaning the net profit or loss of an open position) into a distorting filter through which the trader interprets everything else.<\/p>\n
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When a position is open and the balance is visible, the nervous system enters a state of selective alertness. It is not fear in the common sense of the term. It is something subtler: a form of focused attention on the number that drains cognitive resources from everything else. In trading, this reference point is the entry price. And the balance is the thermometer of how far away or close one is getting to that point. The practical result is that the trader no longer evaluates the position based on what the market is doing, but based on what the balance is doing relative to their entry. <\/p>\n Discount blindness doesn't eliminate analytical capacity. It distorts it. The trader continues to look at the chart, to read the signals, to observe the market context. But they interpret them through the filter of their balance. This phenomenon is known in cognitive psychology as situational confirmation bias<\/a><\/span>the tendency to seek out and value information that confirms our current position, especially when that position has a significant emotional component. In trading, the open balance is precisely that component. <\/p>\n A common mistake is to think that balance blindness only affects you when you are in the red. In reality, it operates in both directions, with different but equally problematic effects.<\/p>\n When the balance is in the black<\/strong>, the trader tends to close too early. The visible profit triggers the need to \u201clock it in\u201d, to make it real before it vanishes. The market might still move in their favour, the original target might still be reachable, but the trader exits. Not because the position requires it, but because the green balance creates an emotional urgency that has nothing to do with analysis.<\/p>\n
\nTwo researchers who helped to understand this mechanism are Amos Tversky and Daniel Kahneman, the founders of prospect theory. In the 1970s they demonstrated experimentally that people do not evaluate outcomes in absolute terms, but in relation to a reference point: their starting position. It loss aversion<\/a><\/span>loss of one hundred euros hurts more than an equivalent gain feels good. The pain is disproportionate.<\/p>\n
\nThey are two very different things. The market follows its own logic. The balance follows the trader's emotional logic.<\/p>\nWhat changes in the reading of the signals<\/h2>\n
\nBasically, it means that:<\/p>\n\n
\nThe result is that the trader stops reading the market with their own analysis tools and starts reading it with their bank account.<\/p>\nHaving a positive balance and having a negative balance produce opposite behaviours, but both are wrong<\/h2>\n