Payment for Order Flow Destroys Your Fills

Your Broker Doesn't Work for You

Your broker gets paid every time you trade. Not by you. By the market maker on the other side of your order.

This is called payment for order flow, or PFOF. And it costs retail traders an estimated $1.5 billion per year in worse execution.

When you click "buy," your broker doesn't send your order to the exchange with the best price. They send it to the market maker paying them the most. The price you get isn't the best available. It's the price that pays your broker.

How PFOF Works (Follow the Money)

The mechanics are simple. Market makers like Citadel Securities, Virtu, and Susquehanna pay brokers 0.1 to 0.5 cents per share to route retail orders to them instead of to exchanges.

Your broker—Robinhood, E-TRADE, Charles Schwab—gets paid per order. That payment shows up in their financial statements. Robinhood disclosed $1.9 billion in PFOF revenue in 2022 alone.

The market maker profits because they quote you a slightly worse price than the exchange would offer. That 1-3 cent difference per share is the source of their profit. It's also your loss.

• You place a market order to buy 100 shares
• Broker routes it to the market maker (not the exchange)
• Market maker quotes you 1-2 cents worse than best-bid
• Broker gets paid 0.2 cents per share ($20 on the 100-share trade)
• You lose $100-200 on the execution
• Everyone profits except you

Why This Is Legal (And Why Brokers Won't Stop)

PFOF isn't illegal. The SEC allows it. Brokers disclose it (usually in fine print on regulatory forms that most traders never read).

The legal requirement is "best execution"—but brokers interpret "best" as "within a reasonable range," not "the absolute best available." As long as they route somewhere, they're compliant.

And here's the incentive problem: for Robinhood, E-TRADE, and other retail brokers, PFOF is 30-50% of total revenue. Eliminating it means either charging commissions or cutting profit margins dramatically. So they won't.

The regulatory path to fixing this is blocked. Congress has proposed PFOF bans multiple times. None have passed. The lobbying power of market makers and brokers is too strong.

The Execution Quality Gap: Retail vs. Institutional

Institutions get better fills because they have leverage. They can negotiate direct market access. They can demand best execution in writing. They can route orders algorithmically across multiple venues.

Retail traders get the default route: to whoever paid the broker.

The cost adds up fast. Research by academic economists shows retail traders lose 1-3 cents per share on average due to PFOF and poor execution routing. On a $10,000 position (1,000 shares at $10), that's $100-300 per trade in lost value.

If you trade 5 times per day, 250 trading days a year, that's $125K to $375K per year in pure slippage from execution quality alone.

Most retail traders have no idea this cost even exists.

Why This Matters for Your Bottom Line

A strategy that should make 2% per month but loses 0.5% to slippage isn't a broken strategy. It's a broker problem.

Think about the compounding impact:

1. Your strategy is designed to return 1.5% per month net
2. You lose 0.5% to PFOF and execution slippage
3. Real return: 1% per month (33% worse)
4. Over a year, $10,000 turns into $12,682 instead of $13,078 (a $400 difference from execution alone)
5. Over 5 years with compounding, that gap is thousands

The market makers are betting that most retail traders won't notice the slippage. They're right. Most don't.

What Automation Fixes (And What It Doesn't)

You can't eliminate PFOF as a retail trader. You can work around it.

Algorithmic execution—custom-built for your strategy—recovers a significant portion of that lost slippage through:

• Order splitting: Breaking large orders into smaller pieces to reduce market impact
• Smart timing: Routing orders during periods of highest liquidity (usually 10:30am-3:00pm EST)
• Iceberg orders: Hiding order size to prevent institutional front-running
• Multi-venue routing: Monitoring all available quotes and hitting the best one (requires direct market access or an algorithm that routes smartly)
• Limit order discipline: Using limit orders with tight spreads instead of market orders

A custom MT5 Expert Advisor built by Alorny can implement these tactics automatically. Your algorithm doesn't rely on your broker's routing. It executes with precision every single time, removing the emotional and timing errors that cost retail traders the most.

The cost? $300-500 for a fully custom EA that handles execution optimization for your specific strategy. Most traders recover that investment in execution savings within the first 2-3 weeks of deployment.

The Institutional Advantage You Can Actually Access

Institutions don't complain about PFOF. They've already solved it:

• Direct market access (DMA) through prime brokers
• Algorithms that route across multiple venues
• Negotiated "best execution" guarantees in writing
• Technology infrastructure that retail brokers don't offer

You can't get DMA on a $2,000 retail account. But you can get the next best thing: algorithmic execution that mimics institutional tactics.

Custom EA automation is the execution-quality equalizer for retail traders. It's how you recover the slippage your broker is designed to steal from you.

Key Takeaways

• PFOF costs you 1-3 cents per share in worse execution. Over a year, this adds up to thousands in lost returns on medium-sized accounts.
• Your broker is legally allowed to route your orders to worse venues if they're paid enough. Robinhood made $1.9B in PFOF revenue in 2022. That's your money leaving the table.
• Institutions fixed this decades ago with direct market access and smart routing algorithms. Retail traders are left with the default: worse fills.
• Automation recovers a meaningful portion of lost slippage through order splitting, smart timing, and multi-venue optimization. A $300-500 custom EA pays for itself in weeks.
• The regulatory path is blocked. PFOF bans keep failing in Congress. The solution is automation, not waiting for regulation.

Your next step: Calculate your actual slippage cost over the last month. (Take your win rate, multiply by average win size, compare to the spread you filled at. The difference is your PFOF cost.) Then compare that number to the cost of automating execution with a custom EA.

For most traders, it's not close. The EA pays for itself in pure execution recovery alone—before you even account for the 24/7 discipline and consistency gains.

See how we'd build a custom execution algorithm for your exact strategy.