IBKR Toolbox: Using ScaleTrader for Single Stocks in TWS

ScaleTrader is a sophisticated trading algorithm within Interactive Brokers’ platform that helps traders scale into large positions efficiently. The essence behind the algorithm is that it allows investors to buy at decreasingly lower prices or sell at increasingly higher prices. ScaleTrader can be used to buy or sell positions in single instruments, pair trades, or combinations. Whether you’re looking to minimize market impact, improve average execution prices, or implement automated trading strategies, ScaleTrader provides functionality that goes well beyond conventional order types. Investors can use ScaleTrader to trade Stocks, ETFs, Options, Futures, FOPs, Currencies, Bonds, and Warrants.

Understanding the mechanics of ScaleTrader is important, but recognizing when and why to apply this approach is equally crucial. Here are several scenarios where ScaleTrader offers strategic advantages:

Position Building in Volatile Markets

In highly volatile markets, entry timing becomes particularly challenging. Rather than trying to perfectly time a single entry point, ScaleTrader allows traders to spread their entries across a price range, potentially capturing better average prices as the market fluctuates. This reduces the risk of poorly timed entries and the psychological stress that accompanies them.

Market Making and Range Exploitation

For instruments that tend to oscillate within defined ranges, ScaleTrader with profit orders and size restoration creates an automated market-making system. The tool will continuously buy at lower prices and sell at higher prices, capturing the spread between these levels repeatedly as prices fluctuate. This approach is particularly effective in sideways markets where directional strategies struggle.

Risk Management for Large Orders

Institutional traders and portfolio managers often face the challenge of executing large orders without adversely impacting the market. ScaleTrader provides a systematic approach to breaking these orders into smaller, more manageable components that can be executed over time with reduced market impact. This is especially valuable in less liquid securities where large single orders might cause significant slippage.

Psychological Discipline Enforcement

Even experienced traders struggle with emotional decision-making, particularly during volatile market conditions. By pre-defining entry and exit points through ScaleTrader, traders effectively remove in-the-moment emotions from the equation. The system executes according to the predetermined plan regardless of fear, greed, or other psychological factors that might otherwise influence trading decisions.

Systematic Trading Implementation

For traders employing systematic or rule-based strategies, ScaleTrader offers a way to automate execution according to predefined parameters. This ensures consistent implementation of the strategy without requiring constant monitoring or manual intervention.

Accessing ScaleTrader

ScaleTrader can be accessed in the Trader Workstation (TWS) in the New Window area under More Advanced Tools located in the other tools section. By using the IBKR color grouping feature, the ScaleTrader will automatically be populated with the last symbol clicked in the TWS. For single orders, the investor uses the Simple Tab.

ScaleTrader is comprised of seven sections: Action Area, Scale Orders, Scale Chart, Auto Price Adjustment, Profit Orders, Summary, and Status. In this article we are going to walk through the investor setting up a trade for a single stock using the profit order feature.

Source: IB Trader Workstation

Configuring Basic Parameters

The investor first chooses to buy or sell in the Action area. Underneath in the Scale Orders area the investor sets the maximum position that will be traded via ScaleTrader, this may be different that the maximum position in the investors account if they have an existing position or are using a separate tool to trade as well as ScaleTrader. The investor then sets the initial component size, which is the size of the first order, and the subsequent component size. The component size can be randomized by plus or minus 55%, and orders can be routed to IBKRATS.

The starting or initial price, this is the price for your first component order can be set either by typing it in the box or moving the mouse to the chart and dragging the blue line to the desired starting price. The investor next sets the price increment which parameter determines how much better each subsequent price will be compared to the previous order. For example, if a stock trading around $45, you might set this to $0.10, meaning each subsequent order will be placed $0.10 cheaper than the previous one for buy orders. Then the investor will set the order type.

Source: IB Trader Workstation

The investor can also change the Time-in-force by clicking on the TIF tab.

The Summary section of ScaleTrader in Interactive Brokers’ platforms displays a comprehensive overview of the scale trading parameters and potential outcomes. It includes number of price levels, average price, total dollar amount, and range.

Implementing Profit Orders with ScaleTrader

 An investor can create a comprehensive trading system managing both entries and exits by utilizing the ScaleTrader’s profit taking order feature. First the investor checks the box next to “Create profit taking orders” and fills in a value for the offset. For example, if buying at $45.00 with a profit offset of $0.50, your profit order would be placed at $45.50. This parameter effectively sets your profit target for each component.  

If the investor chooses to restore the size after taking profit that check the box.  When enabled, this feature automatically places a new buy order after a profit order executes, creating a perpetual trading cycle. This is particularly valuable for range-bound markets or when implementing a market-making strategy. The system essentially “reloads” after taking profit, allowing you to continuously capture price oscillations.

The “Restart ScaleTrader” function resets and reinitializes a ScaleTrader order in Interactive Brokers’ trading platforms. When activated, this feature clears the current state of a scale order that has been partially filled, allowing the system to recalculate and reestablish the scale components based on current market conditions and the remaining order quantity. This is particularly useful when market conditions have changed significantly since the original scale order was placed, or when a trader wants to refresh the scaling parameters while maintaining the overall order strategy. The restart function essentially gives traders the ability to adapt their scaling strategy without having to cancel and recreate the entire order manually.

Source: IB Trader Workstation

Once the investor has reviewed their order they can click on Transmit to start the ScaleTrader order. The investor can track the progress in the Status area of ScaleTrader or in the Activity Panel in Mosaic.

Source: IB Trader Workstation

For more on ScaleTrader please see the Trader’s Academy Lessons

1. ScaleTrader
2. ScaleTrader – Pairs Trading
3. ScaleTrader – Setting Profit Orders
4. ScaleTrader – Pairs Trading using the Profit Taker