If we can place a Minimum/threshold volume Limit order. Let say Best Bid has 1200 and Best Ask has 1679 lots in markets. I want to place a Limit Order on Best bid only if there are 800 lots are there. Right now market had 1200 lots on Best Bid then Limit Order on Best Bid will be active , as soon as Best Best Qty reduce below to 800, Limit order will not be placed on exchange, it will show our order but it will be in parked mode.