Market order filled at unexpected price - is this normal?

I’m pretty new to futures trading and something weird happened today. I was trading E-mini S&P futures and placed a market sell order to go short. The order got filled but at a price that was way different from what I expected when I clicked the button. The fill price was much worse than where the market was showing when I submitted the order. This was just on a demo account so no real money lost, but it really threw off my whole trade plan. I’m using TD Ameritrade as my broker. Is this something that normally happens with market orders? Should I be using limit orders instead? Any advice would be helpful since I don’t want this to happen when I start trading with real money.

Yeah, market orders in futures will do that to you. You get filled at bid/ask, not the last price on your screen.

E-mini S&P has good liquidity but you’ll still get filled a few ticks off sometimes. Gets way worse during news or when volume’s light.

Learned this the hard way years ago. Now I use limit orders for entries and only hit market when I need out fast.

TD’s platform shows delayed prices sometimes too. Make sure you’re watching real-time Level II, not basic quotes.

Try some small limit orders on demo first. Set them a tick or two from current market and watch how fills work. Beats getting burned by bad market fills when you go live.

Market orders fill at whatever price is available - not necessarily what’s on your screen. E-mini S&P usually has tight spreads but gets wild when liquidity drops. Demo accounts don’t always match real trading conditions. Stick with limit orders for entries so you control your fill price and avoid surprises.

Market orders guarantee you’ll get filled, but the price can shift while your order travels to the exchange. E-mini S&P moves fast. Your demo probably shows stale data. Real fills happen at bid/ask prices, not the midpoint you see on charts. Stick with limit orders for better control. Set your price where you actually want to get filled. You’ll miss some trades, but won’t get burned by surprise fills when you’re trading real money.

Always use limits on entries. Market orders are for exits only.

Futures spreads can be way wider than you’d expect. Market orders just grab whatever price is sitting there at that moment.