Hello Rahul,
There are various reasons to why scripts move a lot. Could be a news,results,promotion. . . BETA value.
The script with high beta value will move a lot with respect to those with lower beta values so find such scripts.
A simple trick,
At end of the day,
1] Open NIFTY 50 scripts list.
2] Add NIFTY to the list.
3] Click on % column so that list will get sorted as per % gains/loss.
4] Find NIFTY in list
Stocks which out performed NIFTY have moved a lot in general so trade any of such stock having higher beta value.
Hope that helps,happy trading :).