That’s a Future traders option if you know how to trade futures!! and yes according to there API it has not all exchanges use the same API to follow Bitcoin. back in 2021 I made a nice bag trading (Buying) from anchorUSD sending to coinbase to sell because the difference was a few thousand according to there API even with the trading fees still made a hefty profit till things were fixed but I see where your coming from I have no need to sell any of my Bitcoin but if I did it would be where I can get the most