Here's a tip when scalping...when a stock runs up and breaches resistance (not weak) it WILL come back down to that resistance it just broke and become support.
So try to take profit after break thu before it dips back to new support.
I use 1 minute ,5 min and 15 min when scalping ,just so I can look a little further out to confirm run.
Throw up a daily chart to check S/R levels and look quickly when you find a stock to scalp.
Or just make a list of 30 stocks (known to make runs and dips) and check all their S/R levels ,this way you have the S/R in advance.
You need to find more than 2 stocks to trade,get familiar with more.