it's good to calculate the position size of each dca based on the size of the first open position. for example, our balance is 1000$, we open 1% balance, then the base order is 10$. then we can set the size of the first dca for example 1 time or 1.1 times from the base order. for the second dca and so on we can determine the multilier that will be calculated from the size of the first dca.