If you dont understand marginal trading, check out my Medium Post:
Understanding Marginal Trading.
I see a lot of people are interested in shorting, however I would advise against it. The market is acting irrational, and people are investing in obvious "shit coins". Shorting a coin that you think is over evaluated is not a good idea, because it can continue to be over evaluated, tons of people are investing in awful coins that have NO utility. So even if you are right, you are playing a dangerous game and when you factor in risk management it likely isn't a good idea. Thoughts?
Firstly marginal trading is already a very risky thing to do and i agree that every minute the BTC market can behave either up or down..... but i will suggest that if you want to short, do your homework well before you want to execute any move.