I came across a neat explanation video on Hecarim top video (How to trade, solo kill, etc.)
Be sure to use the English closed caption because the video is in Korean.
I've never played hecarim, and managed to POP OFF on my plat smurf lmao
It has a small skill cap, and can be easily mastered. Try it for yourselves friends!
Oh and here's the op.gg of player in the video: https://www.op.gg/summoner/userName=%EC%A7%80%EC%84%B10153