Eg - If Nifty Open price is 8000 i need nifty to either up 20 or down 20 and once its up go for a buy with 20 point SL and the same vice versa .
Yes, you can use Price alert Indicator check below link
https://zerodha.com/expert-advisors/code/price-alert-indicator
but what if there are more than 1 scrips to keep alerts for? bcoz expert adviser needs to mention price in the script.
yes for different scripts to scan it will not work.