Probability of Profit (POP)

TL;DR: Probability of profit (POP) tells you how likely a trade is to make any money at expiration — but a high POP does not mean a high expected return.

Probability of profit is derived from options pricing models and represents the statistical likelihood that a position will be profitable at expiration. For a simple short put, POP is approximately 1 minus the absolute value of delta at entry. For example, selling a put with a 0.30 delta gives you roughly a 70% probability of profit. For multi-leg strategies like an iron condor, POP is calculated from the probability that the underlying stays between the breakeven points, which depends on the net credit received and the strikes selected.

The critical concept that many traders miss is the tradeoff between POP and expected value. A trade with 90% POP might collect $50 in premium but risk $450 — the expected value is roughly zero (0.90 x $50 - 0.10 x $450 = $0). Markets are efficient at pricing this balance, so higher-POP trades generally offer smaller rewards relative to their risk. The goal is not to maximize POP, but to find trades where your edge — through better timing, volatility analysis, or directional conviction — tilts the expected value in your favor. An IV rank above 50 often signals that selling premium (high-POP trades) offers better expected value than usual because elevated implied volatility overstates actual future movement.

Target POP ranges vary by strategy. Premium sellers typically aim for 65-85% POP — high enough to win frequently but not so high that the risk/reward ratio becomes unfavorable. Directional buyers accept lower POP (30-50%) in exchange for larger potential payoffs. ThetaCommand factors probability of profit into its scoring framework, helping you identify setups where the POP aligns with favorable volatility and liquidity conditions rather than chasing high-probability trades with poor expected value.