I'm pretty sure you misunderstand market orders because by definition they are only visible to the market after they have traded, so nobody can get ahead of you or do sonething irrational before your order lands.
I would agree that market orders are a bad idea at any meaningful volume (outaide of retail sizes) because of liquidity and routing reasons
I would agree that market orders are a bad idea at any meaningful volume (outaide of retail sizes) because of liquidity and routing reasons