The Trade That Filled 2 Points From Where I Clicked
CPI day, January. I’m watching NQ and it’s coiling right below a level I’ve been eyeing all morning. Number drops, NQ explodes, I hit market buy. My limit was basically “get me in now.” I see the fill come back: 17,842. I look at the chart. Price when I clicked? 17,840. Two full points of slippage on a micro NQ. That’s $4.00 per contract, which doesn’t sound like much until you realize my target on that trade was only 8 points. I gave up 25% of my potential profit before the trade even started.
That’s slippage. And it will rob you quietly if you don’t pay attention.
Why Your Fill Price Isn’t Your Click Price
Slippage is the difference between the price you expected and the price you actually got. It happens because the market moves between the moment you submit your order and the moment it gets filled. In fast markets, that gap can be ugly.
Think of it like this. You see a price on your screen. You click buy. Your order travels from your computer to your broker to the exchange. The exchange matches your order with someone willing to sell. That whole process takes milliseconds, but in a market that’s ripping 10 points per second during a news event, milliseconds matter.
Slippage happens most during:
- News events (CPI, FOMC, NFP, earnings). Liquidity evaporates, spreads blow out, and the book gets thin. This is where my 2-point fill came from.
- Market open (9:30 ET cash open). The first 5 minutes are chaos. Orders are slamming in from every direction.
- Low volume periods (lunch hour, overnight). Fewer participants means fewer resting orders, which means your market order has to reach further to get filled.
- Fast moves and squeezes. When everyone is hitting the buy button at the same time, there’s nobody left to sell to you at the current price.
Market Orders Are the Worst Offender
I used to market order everything. Just smash the button and deal with whatever fill I get. That’s fine 90% of the time when ES is moving normally and the spread is a quarter point. But that other 10%? It’ll eat your lunch.
A market order tells the exchange “fill me at whatever price is available right now.” If the best available price is 2 points away from what you saw on your screen, congratulations, that’s your fill. No take-backs.
Limit orders solve most of this. A limit buy at 5,200 means you’ll only get filled at 5,200 or better. The downside? If the market blows through 5,200 and keeps going, you might not get filled at all. You avoid slippage but you miss the trade. Pick your poison.
The Real Cost Over Time
Here’s what made me take slippage seriously. I went through two months of trades and compared my intended entry prices (what I wrote in my plan) to my actual fills. Average slippage: 0.4 points on ES per trade. Doesn’t sound like much.
But I was averaging 6 trades a day. That’s 2.4 points of slippage daily. At $50 per point on ES, that’s $120/day. $600/week. $2,400/month. I was hemorrhaging $2,400 a month to slippage and I didn’t even realize it because each individual instance looked tiny.
Scale that to NQ where I was slipping 0.5-1 point on average at $20/point? Yeah. It adds up fast.
What I Do Differently Now
I’m not going to tell you I eliminated slippage. You can’t. It’s part of trading. But I cut mine by probably 60%:
I use limit orders for entries almost exclusively now. I decide my price in advance, place the order, and let the market come to me. I miss some trades. That’s fine. The trades I do get fill exactly where I want them.
I avoid trading the first 30 seconds of a news release. That CPI trade I mentioned? If I’d waited 90 seconds for the initial spike to settle, I could’ve gotten in at a better price with zero slippage. The move had plenty of follow-through. I didn’t need to be first.
I watch the order book before I fire. If I see the bid/ask spread on NQ is 2 points wide instead of the usual 0.25, I know liquidity is thin and slippage risk is high. I either use a limit or I sit on my hands.
I trade during high-liquidity hours. 9:30-11:30 ET and 1:30-3:30 ET are when ES and NQ have the most volume. Tighter spreads, deeper books, better fills. My overnight trades consistently have worse fills than my morning trades.
Slippage isn’t sexy to talk about. Nobody posts their fill quality on Twitter. But it’s one of those invisible costs that separates traders who grind out a living from traders who can’t figure out why their strategy works in backtesting but not in real life. Your backtest got perfect fills. You won’t.