VOXEL is built from the bottom up, and when it reaches the upper limit and the funding rate but has already taken profit, it will switch hands and reopen because opening a moving robot, if it continues to be bullish, the moving grid brings very little profit, it is better to reopen a new position for the directional robot.

Why not set the upper limit high enough all at once?

Because the risks are different. Maintaining a 2-30% profit-taking range and reassessing whether to re-enter at the point is the least risky, however, the risk of a -2% rate is now lower, and the exchange encourages the contract price to chase the difference with the spot price.