May be i am not getting you!!! The data of F2 on derivative closing day does not become the data of F1 next day i.e the first day of derivatives!!
Good to know it works well for you!!!!
Let me explain with the help of example.For Aug the expiry was on 28th Aug.So till 28 th Aug I will trade levels of Auf Fut chart as Aug F is F1 and Sept Fut is F2 till 28th Aug .While updating the intraday data in my charts on Aug 28th evening I put data of Sept fut in my charts as next day Sept Fut is going to be F1 and I am going to trade Sept fut chart from 29th Aug onwards.
Alternatively one can keep two charts last 1-2 days of expiry.
Best Wishes,Trade well !!!