How to select Natural gas - Options

Hello Team,

I am building a strategy for Natural gas options.

I want to sell both Natural Gas ATM Call and Put options at 5.30pm every day.

However I want to select the rounded Strike price - example 620, 603, 640 etc.

I do not want to take entry at 625, 635 ,645 due to low volatility.

I tried ATM and trades are being executed (Paper trade) but when I use “Round” funtion, no trades are executed.

I used “Round”, "Ltp’ with 10 as the base but not entries are taking place.

Please advise

Can you attach your strategy code screenshot?

In LTP field did you refer to the underlying selecting expiry also pointing to current month?