Slippage is the difference between the price you expected when you placed an order and the price the order actually filled at.
A stock shows $50.00 on your screen and you place a market order to buy 200 shares, expecting to pay $10,000. By the time the order fills, the price is $50.05, so you pay $10,010. The $0.05 a share, $10 in total, is slippage. It can also go your way: had the price dipped to $49.98, you would have paid $9,996.
Stops show it most. A sell stop at $45 on a stock that closes at $46 and opens the next morning at $42 fills near $42, not $45: $3 a share of slippage.
JagSim fills every order at the price of a real trade, with no bid, no ask and no spread, so the slippage a spread causes at a real broker does not happen here. Slippage from a moving price does. The confirmation shows the price your order filled at, which can differ from the price on your screen a moment earlier. A stop fills at your stop when the price moves through it, and at the first trade past it when the price jumps. A limit order never fills worse than your limit. How trading works on JagSim.
Using market orders in thinly traded stocks. With few trades, the next trade can be well away from the last one, so a market order can fill far from the price you saw.
Expecting a stop to fill at the stop price. A stop becomes a market order once it triggers. In a gap or a fast fall, the fill can land well past your stop.
No. The price can move in your favor between the order and the fill, which gives you a better price than you expected.
A limit order caps the price you will pay or accept, so it cannot fill worse than your limit. The trade-off is that it may not fill at all.
The price moves between the moment you decide and the moment the order fills. It tends to be larger in fast markets, around news, near the open, in thinly traded stocks and for large orders.
It depends on the simulator. JagSim fills at real trade prices, so moves between your click and the fill show up, but it has no bid-ask spread, so a real broker usually fills market orders a little worse.
Last updated: October 2026
Educational only. Not investment advice. JagSim is a simulator, not a broker.
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