Example of high probability setup for long intraday entry by using readily available free resources at your disposal

Watch out for top Gainers/Losers from NSE site
https://t.co/rldBIkYzMY

Check if the respective sectoral Index is also among the top performing index.
Here the criterion is met as top gainer as well as sectoral index are matching.
https://t.co/D9lDQ7ieR8

Check if open interest is also supporting the criterion

https://t.co/eHkCqvcYeC

Here this criterion is also matching as Cipla is showing good rise in open interest among the constituents of pharma index

Finally lookout if the intraday price action is also supporting long entry.
Kindly wait for 1 hour for market to settle & to ensure all above criterions are met.

Same can be replicated for short entries as well. There are many ways of deciding your own criterion for long/short entries like
1.Rise in Volume & rise in Open Interest.
2.Above previous day's high or below previous day's low.
3.Pivot/CPR/VWAP Etc. for entry/exit.