Comment on Code your Technical Analysis strategy

Thanks Zerodha for having algo trading. Please help me with the code for below logic.

This code is based on 1 minute candle and is based on 2 sets of EMA crossover only.
logic for buy entry :
one minute EMA(90) crossing over one minute EMA(390) ( meaning the previous minute ema 90 is less than ema 390) and the ema(90) should also be greater than ema(150)
logic for sell entry :
one minute EMA(90) cutting down one minute EMA(390) ( meaning the previous minute ema 90 is greater than ema 390) and the ema(90) should also be less than ema(150)

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