I know people who scalp only thin stocks (avg daily volume less than 20k shares), as well as ppl who scalp NF. To get started I will suggest two criteria:
1. The stock must be sufficiently liquid so that you can get out fast (it does not hits ur hard stop). So keep out of GLOBALVECT and the like.
2. The tick volume should not be too high, or else it becomes harder to recognize institutional buyers/sellers. So keep out of NF or reliance.
The one's which Kripal had been posting fit well the above. Let me post on monday some order book examples... then I will add few moew criteria.
Also if you don't understand any terminology just google or ask flat. Terminology and theory is meant to be supportive, not confusing