&gt; If I&#x27;m buying with limit orders, can someone explain how I&#x27;d get a bad deal<p>No idea if this actually happens on those exchanges, but:<p>Suppose you place a limit order to sell STCK for $x and I only execute it (giving you $x) if the price goes above $x+1. Someone&#x27;s making $1 on that spread and it definitely isn&#x27;t you.<p>Conversely you place a limit order to buy STCK for $x and I only execute it (costing you $x) if the price drops below $x-1.