settlement is a different process, what exchanges are doing is they match Buy and Sell orders. you have an open Sell 1 APPL for $100.0. Millions of other HFT o

settlement is a different process, what exchanges are doing is they match Buy and Sell orders. you have an open Sell 1 APPL for $100.0. Millions of other HFT orders rush to scalp your single order. How do you think exchange matches your Sell to HFT's Buy orders? which Buy order gets fulfilled first?