Single leg SPY and SPX

Single leg options SPX, SPY

Anyone run single leg options OTM, ATM on SPX or SPY, I have been trying to run these daily 0DTE and build and backtest a strategy but have not found anything.

I am targeting a 0.x percent move in the stock which usually results in the option premium rising which I will then sell it back to market before close if OTM or if using SPX cash settled will keep to close and get the intrinsic value.

But kinda of what I am trying to say is I have tried everything including price action and indicators I find are always lagging and price action using levels and support and resistance I didn't get anywhere. Also looked into vwap as well to no avail.

I feel like these are useful tools but I am not using them right and well I am not sure of next steps or how to build a strategy that survives my backtest of around 1k days of SPX since currently none of them do.

So am I doing something wrong or what do you all suggest is there a different approach to look for what you all think? There is definitely a way but how do you all build your options strategies?

Just looking for some discussion if that's alright.