How to select strike in based on price range

Hi,

I want to select CE and PE strike based on price range example 200-250 LTP at specific time. If any of it’s price moves certain percentage / points, i want to take entry on that side. I checked GET STRIKE and FIND STRIKE. With those keywords, i have option to select price either below 200 or above. But my requirement is i want to choose strike between 2 price range and take trade whichever side gives breakout at specific time.