Nowadays stocks only because you can find such very unique stories/themes/dynamics; & if able to exercise extreme patience and prejudice... Requires PLUNGING some size & taking the UNIQUE risk. Options on said stocks, not like the good old days, not "easy" but sometimes worthwhile.
The more liquid/heavy participation the market, the more algos have rendered it onto a field of death; macro, FX, popular futures, vergetaboutit unless you identify correctly at the right time a shift in dynamics leading to prolonged "trend"
Scalping? Yeah there will be some scalping alright, will you have any skin left to show?
Like to use a stop, because, well, you'r not insane nor a delusional debutant? Combine that w/ high intra-day leverage in popular heavy participation mrkt, meaning you use a TIGHT stop - Vergetaboutit, you'r all done