If I select 1st candle with the nth candle indicator or if I add the opening range indicator. What is the difference between these two? will it give the same trades?
There is no such difference between these two. Both will give the same results. Refer to the below examples, you will notice that both strategies are giving the same results.
Nth Candle - Streak | World's first algo trading platform without coding
Opening range - Streak | World's first algo trading platform without coding
Hope this helps.