Perfect! I wanna thank everyone for your comments, it actually helped a lot! And well I'm not using USDT as a base for my trading... I'm actually using it as a way to "freeze" the BTC price or an altcoin price, then when I detect there's a bottom line I buy again and stick with the coin again... I believe this is calling "Scalping", please correct me if I'm wrong. Anyway USDT has been a great tool for this kind of strategy.