Direct Access Brokers: Why Speed Matters for Active Traders

What Is a Direct Access Broker?

A direct access broker gives you the ability to route your orders directly to specific exchanges (NYSE, NASDAQ), ECNs (ARCA, EDGX, BATS), and market makers. Instead of submitting an order that your broker routes wherever they choose — often to a wholesaler who pays for the order flow — you choose exactly where your order goes.

This matters because speed and fill quality are directly tied to profitability for day traders. When you send a market buy order through a retail broker like Robinhood, the order goes to a wholesaler (Citadel, Virtu), gets filled at whatever price the wholesaler provides, and arrives back at your account. That process takes 500-2,000 milliseconds and may include price improvement that is less than what you would get routing directly to an exchange.

With a direct access broker, your buy order goes straight to ARCA or NASDAQ. You see your order in the book. It fills against the displayed ask price, and the confirmation arrives in 50-200 milliseconds. For day traders executing dozens of trades per day, this speed difference is the edge.

Speed and Fill Quality

The execution speed gap between direct access and retail brokers is not theoretical — it is measurable and impacts your bottom line daily.

Direct access execution:

• Order to fill: 50-200 milliseconds
• You choose the routing destination
• Your order is visible in the Level 2 order book
• Fills occur at displayed NBBO or better via exchange price improvement programs

Retail broker execution:

• Order to fill: 500-2,000 milliseconds
• Broker routes to a wholesaler via PFOF arrangement
• Your order is not visible in the public order book
• Fills may be at NBBO, but the wholesaler captures the spread economics

On a fast-moving stock, 1-2 seconds of delay can mean $0.05-$0.20 per share of slippage. Across 10 trades of 1,000 shares each, that is $500-$2,000 per day in execution costs that are invisible in a retail account.

Direct access is essential for reading Level 2 quotes effectively. When you can see your own order in the book and route to specific venues, you gain information about market microstructure that retail platforms do not provide.

DAS Trader Pro

DAS Trader Pro is the most popular direct access platform among active day traders. It connects through brokers like Interactive Brokers, CenterPoint Securities, and SpeedTrader.

Key features:

• Customizable hotkeys with scripting support for risk-based position sizing
• Built-in Level 2 with order routing to all major exchanges and ECNs
• Time-and-sales window with filtering by size and exchange
• Chart trading with point-and-click order placement
• Paper trading simulator that mirrors live functionality

DAS is not pretty. The interface looks like it was designed in 2005 because it was. But it is fast, reliable, and infinitely customizable. Most professional day traders prioritize function over form, and DAS delivers on execution speed.

Cost: DAS Trader Pro typically costs $100-$150/month depending on your broker. Some brokers waive the fee if you generate enough commission volume.

Sterling Trader Pro

Sterling Trader Pro is the institutional-grade alternative to DAS. It is used by prop trading firms and professional traders who need the absolute fastest execution.

Key features:

• Sub-100 millisecond order routing
• Advanced order types (reserve orders, discretionary orders, pegged orders)
• Multi-account management for prop firms
• Real-time buying power and risk monitoring
• Direct connectivity to all U.S. exchanges and ECNs

Sterling is generally considered faster than DAS for raw order execution but less customizable for hotkey scripting. It is the platform of choice for scalping strategies where every millisecond counts.

Cost: Sterling typically runs $250-$350/month. Many prop firms provide it as part of their platform package.

Choosing a Direct Access Broker

The platform is half the equation — the broker behind it determines your commissions, margin rates, short inventory, and buying power.

Commissions at direct access brokers range from $0.003 to $0.006 per share. On 1,000 shares, that is $3-$6 per trade. This is more than zero-commission brokers, but the fill quality improvement typically saves more than the commission costs.

Slippage reduction alone often pays for commissions several times over. If direct access saves you $0.03 per share on average and you trade 5,000 shares per day, that is $150 per day in slippage savings against roughly $25 in commissions.

Setting Up Your Direct Access Platform

Once you have selected a broker and platform, configure it for your day trading setup.

Essential configuration steps:

1. Set default route to SMRTL (smart routing) for general orders
2. Configure hotkeys for buy, sell, flatten, and stop loss
3. Set up Level 2 windows for your most-traded stocks
4. Configure time-and-sales with filters for block trades (1,000+ shares)
5. Set risk controls — maximum position size, maximum daily loss, and maximum number of trades
6. Test everything in the paper trading simulator for at least one full week

Risk controls are not optional. Every direct access platform lets you set hard limits on position size and daily loss. If your max daily loss is $500, the platform will flatten all positions and lock you out once you hit that threshold. This prevents emotional blowups.

Direct access fills tie directly into order fills quality — the combination of speed, routing control, and visible order book participation gives you an execution edge that compounds across thousands of trades.

Frequently Asked Questions

Do I need a direct access broker to day trade?

You do not need one to start, but you will eventually want one if you are serious about day trading. Retail brokers are fine for learning, paper trading, and swing trading. Once you are trading actively (more than 10 round trips per day) and your strategy depends on precise entry and exit prices, the speed and routing advantages of direct access become a meaningful edge. Most professional day traders switch to direct access within their first year.

Why do direct access brokers charge commissions when retail brokers are free?

Retail brokers are free because they sell your order flow to wholesalers — a practice called payment for order flow (PFOF). The wholesaler profits from the spread between where they fill your order and the NBBO. Direct access brokers do not sell your order flow; they route it directly to exchanges. You pay an explicit commission but receive better fill quality and faster execution. The net cost of trading is often lower at a direct access broker despite the visible commissions.

Can I use DAS Trader Pro with Interactive Brokers?

Yes. Interactive Brokers offers DAS Trader Pro connectivity. You open an account with IB, subscribe to DAS Trader Pro, and connect DAS to your IB account via API. This gives you IB's low commissions and margin rates combined with DAS's superior order entry interface. It is one of the most cost-effective direct access setups available.