The time frame is 3H. As per the current sentiment of the market, it is highly probable that nifty gets into a downtrend after the 20% recovery of the market.
PS- Its my personal view on Nifty 50. If the pandemic situation gets more worst( which looks to be sure), chances arises to see lower levels of nifty in the future. It's better to keep invest in every dip of like 100-200 gaps which I do.
Pro tip- In the current unstable market, it's always better to have some cash in hand and not to invest the total amount of your account.