Your Broker Could Be Stopping You Out at Prices the Stock Never Traded.
Here's a warning for traders, especially beginners and those using offshore brokers or platforms offering 24-hour trading.
A trader reached out yesterday because his stop-loss on a U.S. stock had been triggered. He believed his broker's chart showed the stock dropping to $184.25, but MTS Velocity showed nothing close to that price.
My first thought? Great, I've got a bug in my software to fix. 😂
So we investigated.
On October 8, during regular market hours:
MTS Velocity: $187.83 low
Schwab thinkorswim: $187.83 low
TradingView: Consistent with the same price action
Trader's reported broker price: $184.25
We also checked pre-market and after-hours exchange data, where the lowest trade we found was $187.61.
That's a difference of more than $3 between the reported broker price and the lowest exchange trade we found.
But here's where things got interesting.
His broker offers overnight trading, and at the time of his screenshot, the spread between the Buy and Sell quotes was nearly $3!
Something many beginners don't realize is that your broker's displayed price isn't necessarily the last price a stock actually traded at.
Depending on the broker, stop-loss orders can be triggered by bid/ask quotes rather than actual exchange transactions. During overnight trading, liquidity can be extremely thin, spreads can widen dramatically, and prices may differ between trading venues.
We haven't confirmed exactly what triggered this particular stop, but it raises an important issue.
KNOW YOUR BROKER.
There are plenty of questionable offshore brokers out there, including poorly regulated and outright fraudulent operations. Some brokers offer CFDs or other derivatives rather than actual ownership of U.S. shares. In those arrangements, the broker may have considerable discretion over the quotes and spreads displayed to customers.
That doesn't automatically mean there's wrongdoing. Plenty of international brokers are perfectly legitimate.
But if you're trading U.S. stocks, you should know:
Are you buying actual shares or trading CFDs?
Where does your broker get its prices?
Do your stops trigger on actual trades or bid/ask quotes?
Are your stop orders active outside regular market hours?
Who regulates your broker, and what protections do you have?
If your broker can't clearly answer these questions, that's a major red flag.
And on a personal note, this investigation was pretty satisfying.
I went into it expecting to find a bug in MTS Velocity. Instead, our market data matched Schwab's regular-session low to the cent and was consistent with TradingView.
A nice bit of validation for what we're building.
Sometimes the problem isn't your trading strategy or stop placement. It's how your broker handles your orders.











