Hi
I used to short at bitfinex and have some idea how to short BTC but I had to close the account at bitfinex for some reason
Now I tried shorting at binance but unlike bitfinix I actually had to "Borrow" funds at a cost despite I have sufficient USDT in wallet.
Am I going in right direction or is there any other way to short without actually taking borrow.
Generally when people short, they use leverage. That requires borrowing. Short traders borrow BTC (paying interest) so they can sell and buy back lower.
Shorting at Bitfinex does in fact depend on a P2P lending market, so short traders can borrow BTC and long traders can borrow USD. You may not have noticed you were being charged interest, or maybe you were shorting with 1x leverage or less so no borrowing was required.
Shorting with 1x leverage is equivalent to selling, so you might as well be spot trading if that's the level of risk you're looking for.