Delta is often used as a rough proxy for the probability an option finishes in the money — but probability of profit is a different thing, because it accounts for the premium you paid. Conflating them is a common and subtle beginner error.

What delta approximates

Delta (say 0.40) is frequently read as “about a 40% chance this option finishes in the money.” That's a useful rough approximation of the odds of the option being ITM at expiration. But finishing ITM by a penny isn't the same as making money — and that's where probability of profit diverges.

Why probability of profit is different

To profit on a bought option, it doesn't just need to finish ITM — it needs to finish ITM by more than the premium you paid (so you recover your cost and then some). So your true breakeven is the strike plus the premium (for a call), which is further than just ITM. That means your probability of profit is lower than the delta-implied probability of finishing ITM — you have to clear the cost, not just the strike. Delta ignores what you paid; probability of profit doesn't.

Delta says “odds of finishing in the money.” Profit says “odds of finishing in the money by more than I paid.” The premium is the gap between them.

The quick takeaway

Delta ≈ probability of finishing ITM; probability of profit is lower, because it requires clearing the premium too. Don't mistake a 0.40-delta option for a 40% chance of profit — it's less, once you account for cost. This is another reason cheap far-OTM options disappoint (low delta and a distant breakeven). NoVo's focus on responsive, sensible strikes keeps the odds and the cost realistic.