Discipline Score: what was your fault, and what was the market's

Every trader has a built-in attribution bias, and it is asymmetric. Winning trades feel like skill. Losing trades feel like the market. This is not dishonesty — it is the brain doing what brains do. But it is the single biggest reason traders do not improve: they cannot tell which losses were their fault and which were just the cost of being in the market. The Discipline Score is a way to separate the two. Every trade gets evaluated on a simple axis: was the loss (or the missed gain) caused by your execution, or by the market's move? Your-fault losses: you chased, you had no stop, you sized too big, you held too long, you took the trade outside your plan, you revenge-traded after a loss. These are controllable. These are the ones the mirror should make you look at. Market losses: you followed your plan, sized correctly, the setup just did not work. These are the cost of doing business. No trader wins every planned trade. Beating yourself up over these is what burns people out. The insight: most traders have both kinds, but they mentally bucket every loss as "market" and every win as "skill." That is exactly backwards from what actually drives improvement. The your-fault losses are the only ones you can do anything about — and they are usually a small number of repeating patterns (3-4 of them) doing 80% of the damage. NoDrift surfaces this as a single number: what percentage of your losses were your fault. Lower is better, but more importantly, the trend matters. A trader who drops from 70% your-fault to 40% over three months is changing — even if their total P&L has not moved yet, because the market's contribution is noise that evens out over time. This is the score that matters. Not win rate. Not P&L. Those are market-dependent. Discipline Score is the only number that measures you.