Ask chatgpt about options greeks, gamma and what it means specially for spx 0dte options. In practice, refer to chart i posted few comments above. When underlying price (SPX here) runs very fast to an otm strike price, the options contract price will spike violently. Same is other way round. When price moves away from the otm strike, contract price will exponentially decrease. You can see the volatility in the chart I posted above. Cross reference that with price action of SPX. The contract jumped from $0.2 per contract to reach a high of $2 per contract in a matter of few mins. Thats 10x growth. Think 10k->100k. And just like that it also came down and expired worthless. Non regards like selling this instead of buying it, of course we don’t do that. Regard plan of action: When you “feel” price is going to make a move towards an otm strike, and you think it will become ITM, buy the option for cheap. And see it 4x-10x, or even 100x some times…. or, this is the best part, expire worthless (highest probability). You gotta be quick with your buttons. HTH.

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