Is Short strangle of deep OTM a good strategy for regular returns?

I’ve been trying Iron Condor in Nifty in the last few expiries at 0.3 Delta, most of the times I ended up in red even after adjusting positions actively. This also shot up my brokerage costs considerably. So quite not understood, whats the logic when they say 30% Probability of ITM, when it is ending up ITM so frequently. Definitely, a change in strategy required.

Previously, I’ve also tried credit spread strategies in stocks based on technical analysis, where I earned profits in many trades consecutively till my last two trades went against me and caused me big losses. Seems like strategies in stock options is only for ppl who have sufficient capital to adjust, and even take assignments of stocks when ITM

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