my strategy needs me to fill at bid and ask, but not the one who are the only person at the bid and ask. One way is to use relative order, but the problem is that the order only becomes more aggressive even though the original bid and ask share has been retracted, at that time i become the only bidder or seller. the other choice is that I send a relative order less than 100 shares (or a hidden order if larger than 100 shares), so even the original bidder or seller recalls their order, my order will not appear at the best bid and ask, and hopefully my order price moves down to the bid or ask at the next level. is it possible?
or i send an order at bid and ask price, and constantly monitor the bid and ask size. if the bid and ask size is idential to my size, i modify my order. but the problem is I need to submit thousands of orders.
or i send an order at bid and ask price, and constantly monitor the bid and ask size. if the bid and ask size is idential to my size, i modify my order. but the problem is I need to submit thousands of orders.
