hi, i used the pairs trade between spot and future in Biance. how to made trade at the exact price I want? e.g. At the moment i use the api to get the best price： spot best ask is 1$ and the future best bid peice is 1.2$，meeting the gap what I want，so i want to sell the spot at exact 1.2 and buy spot at exact 1, but when i use post api to make a limit order, the price is changed so the pairs trade failed.
that’s trading strategy that we can do limit support on that.