How to track price of an option

I want to track the price of an option when day opens trade it when price meets certain condition.

example : Suppose nifty opens at 17800 then i want to track price of 17800 CE and whenever price of 17800 Ce goes below its 5 sma then i want to sell it.

Need help in keywords to be used.

Hello,

This willl require custom coding, as we need to capture the option instrument and strike to use it for later to check the conditions.

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