You have the answer in your post itself
. Basically wait till 3:25 / 3:27. The trading price at that time will be more or less the closing price of the day. You can decide to enter based on the values at that time. Don't switch to lower level timeframes. EOD timeframe at 3:27 will do.
One more doubt. Do I need to consider crossover happens in mid day or I should look it only by 3:27.
Reason I am asking this question is, EMA is calculated on close price. As we take LTP as close price before EOD, crossover will change based on the LTP.
Today ITC Nov future
Open - 287.05
High - 287.7
Low - 284.8
When LTP was 285.5 and used as close price cross over doesn't happen. Now LTP is 286.5 and crossover happens. What if in another half hour price goes down to 285.5 again. This means crossover doesn't happen right?
As I did math, until 285.9 of close price crossover doesn't happen if close is above 285.9 crossover happens. So what if now the LTP price is 286.5 and EOD closes at 285.9 or less?