#插针 This is a video I posted on January 25 to remind all contract gamblers. If you are willing to watch this video, it will definitely help! You can also reflect on why F is less than 0. Why do you have to wait for an empty position when F is less than 0! ! Believe in science, don't study metaphysics, learn the Kelly formula, and you will reduce losses in the ever-changing market in the future! ! #美国加征关税 #加密市场回调 $BTC