Direct Access Brokers vs Robinhood: Why Speed Matters
By Mario Maldonado · Read time: 9 min · Leer en Español
The Big "Free Trading" Lie
Robinhood popularized commission-free trading in 2013. Since then, nearly every retail broker copied the model. The question nobody asks out loud: if the broker doesn't charge you commission, where does their money come from?
The answer is PFOF — Payment for Order Flow. Understanding how it works is understanding why professional traders happily pay commissions.
What PFOF Is and How It Affects You
When you send a buy order to Robinhood, Robinhood doesn't route it directly to the market. It sells it to a market maker (Citadel Securities, Virtu Financial, etc.). The market maker executes your order, but at a slightly worse price than the best available in the market, and keeps the difference. Robinhood receives a portion of that difference as payment.
Result: you think you're trading free. In reality, you're paying with execution price. On small trades the impact is minimal. In active day trading with 1,000–5,000 shares per trade, PFOF slippage can run $50–$200 per trade.
What "Direct Access" Actually Means
A direct access broker gives you direct control over how and where your order is routed. You choose the ECN (Electronic Communication Network): ARCA, BATS, EDGX, NASDAQ, NYSE. Each ECN has different rebates (they pay you for adding liquidity) and fees (they charge you for removing liquidity). A sophisticated trader optimizes routing to minimize costs or even earn rebates.
Full Broker Comparison
| Feature | Robinhood | Webull | IBKR Lite | IBKR Pro | Lightspeed | CenterPoint |
|---|---|---|---|---|---|---|
| Commission | Free | Free | Free | $0.005/share | $0.0045/share | $0.006/share |
| ECN Control | No | No | No | Yes | Yes | Yes |
| Short Inventory | Very limited | Limited | Good | Excellent | Excellent | Best |
| Execution Speed | Slow | Medium | Medium | Fast | Fast | Fast |
| Platform | Mobile app | App | TWS | TWS | Laser | Sterling |
| Best For | Retail investor | Swing trader | Casual | Active trader | Day trader | Short seller |
Why Short Inventory Matters More Than You Think
In small cap trading, many of the best opportunities are shorts — stocks that gap up artificially and then collapse. To short, your broker needs shares available to lend you (borrow). Robinhood and Webull have ridiculously limited borrow inventory on small caps. IBKR Pro, Lightspeed, and CenterPoint have agreements with multiple prime brokers and custodians to source borrow on hard-to-borrow stocks.
If you want to short sell small caps, you need a direct access broker. Without borrow access, half the professional strategies are closed to you.
Minimum Capital Requirements
- Robinhood/Webull: $0 (or $2,000 for margin)
- IBKR Lite/Pro: $0 (but $25k to avoid PDT restriction)
- Lightspeed: $10,000 minimum, recommend $25k+
- CenterPoint: $30,000 minimum
Platform Compatibility
SmallCap Executor is designed to work with direct access brokers that offer API integration or compatibility with DAS Trader and Sterling. That's exactly why the system exists — retail platforms don't give you the control needed to execute small cap strategies with precision.
If you're currently on Robinhood and seriously want to day trade, upgrading to a direct access broker isn't an expense — it's the most profitable investment you can make. The slippage savings usually pay for the switch within the first month.
How to Make the Transition
Don't close your retail account abruptly. The smart process: open the direct access account → fund it with the minimum → trade in parallel for 30 days → when comfortable with the new platform, move your main capital over.
The learning curve on platforms like DAS or Sterling is real — they have more features but also more complexity. The adaptation time is well worth every hour invested.