&gt; I covered that. If you really, truly, want to sell at any price(and I can&#x27;t imagine why, that is terrible trading), then you set your limit to zero.<p>Perhaps to avoid a margin call; your imagination is limited, you seem to forget you also have to buy&#x2F;sell to exit a position when holding on is not an option. Terrible trading is holding on until you get margin called; when your risk management says get out, you get out. A stop loss isn&#x27;t a stop loss if it can fail to fill or only get partially filled, a market order is exactly what one desires in a stop loss.<p>&gt; That&#x27;s all a market order is - a special case of a marketable limit order (immediate or cancel&#x2F;fill and kill&#x2F;etc) with the limit set to zero (in the case of a sell) or infinity (in the case of buy).<p>Yes, and thus no need to ban it.<p>&gt; Banning vanilla market orders just forces people to acknowledge that fact, which is a good thing.<p>You can&#x27;t force people to acknowledge details they don&#x27;t care to know about.  Ban this, ban that; it&#x27;s all non-sense from people who think they can force the ignorant to learn, you can&#x27;t. Banning market orders achieves nothing.