Order Flow Trading Risks Explained
Your broker sells your trades before you even make them. Here’s what that costs you.
The way your trades get routed determines who profits from them and how much of your return quietly disappears before you see a single green number.
Your Broker Sells Your Orders
They get bought by a wholesaler — a firm like Citadel Securities or Virtu Financial. This practice, called Payment for Order Flow (PFOF), was a key driver behind the elimination of most brokerage commissions in the U.S. You stopped paying $7 per trade. But the trade itself became the product.
The wholesaler fills your order and collects the bid-ask spread. A portion of that profit goes back to your broker as a kickback. Three firms now handle over 80% of all U.S. retail equity orders. That concentration should concern you.
Where It Hurts
Brokers tend to route your orders to whoever pays the most, rather than whoever fills them fastest or cheapest. This adds up over time.
Over 90% of all retail marketable orders flow to a small, concentrated group of wholesalers. Your order lands in a private pool, away from the public exchange. That fragmentation weakens price discovery for everyone.
Over two-thirds of all PFOF revenue comes from options, where payment rates run nearly double what stock orders generate. Your broker earns twice as much when you trade options. Think about that next time the app nudges you toward weekly calls with a colorful interface and gamified alerts. The nudge has a price tag.
SEC Doesn’t Have Your Back
In June 2025, the SEC under Chair Paul Atkins withdrew proposed Rule 615, which would have required retail orders to compete in open auctions before wholesalers could internalize them. The SEC had estimated the rule could save retail investors $1.5 billion annually. Gone. The handful of firms skimming fractions off every retail trade in America kept their tollbooth intact. Nobody voted on it. Nobody asked you.
Always Use Limit Orders
A market order hands full discretion to the wholesaler. A limit order forces them to fill at your price or walk away. Price improvement on most internalized market orders amounts to a tiny fraction of a penny — often just $0.001. That’s the “savings” they advertise. A limit order gives you real control.
By the way, every wholesaler files a public SEC Rule 605 report that shows execution quality, speed, and effective spreads — broken down by order type and size. Your broker also files a Rule 606 report showing exactly where they route your orders and how much they get paid. Both are free and public. Almost no retail investor reads them.
💡 EXTRA HINT: If you want to bypass PFOF entirely, a few brokers still route directly to exchanges — IEX being the most notable. You can also check if your broker lets you specify order routing preferences. Most don’t advertise this. You have to dig into advanced settings. The option exists precisely because they’d rather you didn’t find it.