That would be good. Now let;s say i want to sell 100 btc 300 and put stop loss at 280 to avoid margin call at 250. Now the market moves to 300 but only 1 bitcoin is sold. My stop order gets canceled. Market moves down and i get margin called. That is nonsense
To increase the nonsensicality, imagine placing 100 pairs of OCO orders for 1 coin each. Then the market moves to 300, 1 sell is executed, 1 stop is cancelled, the other 99 remain in place as desired. Normally orders of the same type combine, but not when "Cancel the Other" is an all-or-nothing action triggered by partial execution.