Size the position to the volatility, not the ideaNebius Group N.V. Class ABATS:NBISRB_TTwo instruments. Same money in each. Nothing like the same risk. Over the same twenty sessions, one of them has been running at roughly 142% annualised volatility. The other at about 41%. That is three and a half times the movement for the same holding period Put an identical amount into both and you have not taken one risk twice. You have taken one small position and one very large one, and you find out which was which on the day something goes wrong. Run it through the three gates. Gate 1, trend. Is the higher timeframe still pointing the way it was? On a chart, that is the 8, 21, 50 and 200 EMAs and the order they sit in. Stacked in sequence is structure. Tangled is not. Gate 2, momentum. Did the condition actually trigger, or did you get in early because waiting felt slow? Gates 1 and 2 decide only one thing between them: whether the trade gets taken at all. Gate 3, risk. This is the one that decides how much, and it is the one almost nobody runs properly. Size to how hard the instrument actually moves, not to how much you like the idea. To risk the same amount on the two above, the volatile one has to be around a third the size of the calm one. There is a second version of the same error, and it shows up whenever someone quotes a percentage. A position down 3% tells you nothing on its own. If the stop sits 4% below entry, that is three quarters of the way to being wrong. If the stop sits 20% below entry, it is noise. Same number on the screen, two completely different situations. Divide the move by the distance from entry to stop. That single figure is comparable across every instrument, every timeframe and every price, and it is the only one worth tracking. The uncomfortable part: the idea you like most is often the one that moves hardest, which means it should frequently be the smallest thing you hold. What do you actually size on, and is it the same for every instrument you trade?