P&L Action: Delta Exit

Updated: September 23, 20256 min read

1. Overview

Delta Exit (labeled Exit When Delta in OptionsApp) is a P&L Action in the Trade Template that lets you close trades automatically as soon as delta falls below or rises above a defined threshold.
The condition can be applied to individual Legs, to groups of Legs or to the entire Combo.

2. How It Works and What the Delta Check Refers To

When using this P&L Action, two thresholds are defined. An exit occurs either when delta falls below a specific value (Below) or when it rises above a defined value (Above). As soon as either of these conditions is reached, OptionsApp triggers the close order.

2.1 What the Delta Check Refers To

With Exit When Delta, you can select what the delta check should refer to.

If All Legs is selected, the check refers to all Legs on the level at which the P&L Action was set. If Exit When Delta is set at Combo level, the delta of the entire Combo is considered. If Exit When Delta is set at Group level, the delta of the respective Group is considered.

If Selected Leg is selected, the check refers to a single selected Leg. However, the closing still takes place on the level at which the P&L Action was set. So if Exit When Delta is configured at Combo level and a single Leg is chosen as the reference, the entire Combo is closed when the delta threshold is reached.

With Selected Leg, up to two Legs can be referenced. The check is performed as an OR condition. As soon as one of the selected Legs reaches its respective delta threshold, the closing is triggered.

2.2 How Delta Values Are Displayed

In OptionsApp, all delta values are shown in the notation that is common in options trading, i.e. as Delta × 100.
A delta of 0.25 therefore corresponds to a displayed value of 25, and a delta of -0.40 to a value of -40.
This notation improves readability and reflects common practice in options trading.

2.3 Monitoring the Delta Limit

The check is not carried out through a previously placed order that sits in TWS, but is actively performed by OptionsApp itself. For an exit to be executed reliably, the app must therefore be actively running during trading, be properly connected to TWS and work without errors.

Unlike a Stop Loss, the Delta Exit can only be triggered once per minute (always at the start of a minute). If the defined delta threshold is crossed during the current minute (for example at 10:40:25), the trade can only be closed once that minute has ended (in the example: at 10:41:00).

3. Configuration

The setting is made directly in the P&L Actions section. This can be done for individual Legs, at Group level or at Combo level.

If Exit When Delta is set directly on an individual Leg, the delta check refers to that Leg and the closing applies to that Leg.

If Exit When Delta is set at Group or Combo level, you can additionally select whether the delta check should refer to All Legs or to Selected Leg. With All Legs, the combined delta of the respective Group or Combo is considered. With Selected Leg, a specific Leg is used as the reference, while the closing still takes place at Group or Combo level.

3.1 Delta Thresholds

There are two thresholds:

is below: Lower threshold; triggers the exit when delta falls below it
or above: Upper threshold; triggers the exit when delta rises above it

With Selected Leg, these thresholds each refer to the selected Leg. If two Legs are selected, separate Below and Above values can be defined for each of them.

It is important to note that the sign of the delta depends both on the option type (Call/Put) and on the position direction (long/short). For individual Legs:

Leg | Delta sign | Delta Exit example
Long Call | Delta > 0 | above Delta 40
Short Call | Delta < 0 | below Delta -40
Long Put | Delta < 0 | below Delta -40
Short Put | Delta > 0 | above Delta 40

If the Delta Exit refers to a Group or the entire Combo and All Legs is selected, a net delta is calculated as the sum of the Legs involved.

The direction and the quantity/ratio of each Leg are taken into account:

Net Delta = Σ (position factor × ratio × Leg delta)
where position factor = +1 for long and -1 for short.

As a result, deltas can reinforce each other, partially offset each other or even change sign. Simple spreads often produce a clearly positive or negative net delta. For structures such as Straddles, Strangles, Calendars or Butterflies, the Combo delta can be close to 0 around the entry and shift dynamically in both directions as the market moves. Accordingly, the chosen Below/Above thresholds should always be understood and sized in the context of the respective strategy.

3.2 Close Order Type

Next, you define how the closing is carried out technically.

Two variants are available:

Market Order: immediate closing at the next available market price.
Limit Order: closing via a Limit Order. In this case, the Exit Behavior must be defined in the Trade Template used; it controls how this Limit Order is placed and processed further (see the article Execution Logic (Entry & Exit Behavior)).

4. Examples

4.1 Delta Exit on a Put Leg

Example: A single Short Put should be opened at delta 20; as soon as delta rises to 30, the Short Put should be stopped out.
Exit condition: Delta Exit on a single Put Leg: Exit when Delta is above +30.
Meaning: The Put is stopped out as soon as its delta rises above +30. The below threshold is not used in this example and keeps the default value of -500.

4.2 Delta Exit on a Call Leg

Example: A single Short Call should be opened at delta 20; as soon as delta reaches 40, the Short Call should be stopped out.
Exit condition: Delta Exit on a single Call Leg: Exit when Delta is below -40.
Meaning: Because a Short Call always has a negative delta, negative thresholds must be used here. The Call is stopped out as soon as its delta falls below -40. In everyday language, the sign would be left out here: "The Call is stopped out at delta 40". The above threshold is not used in this example and keeps the default value of +500.

4.3 Delta Exit on a Put Spread

Example: A Put Spread whose Short Put is at delta 20 and whose Long Put is at delta 10 should be closed if delta rises to 40 (the loss case) or falls below 3 (the profit case, effectively a Take Profit).
Exit condition: Delta Exit on a Group: Exit when Delta is below +3 or above +40. Close order via Limit Order.
Meaning: This is a Put Credit Spread whose Legs look as follows: Short Put: Delta > 0, Long Put: Delta < 0. Since the Long Put is placed below the Short Put, the positive delta of the Short Put will be larger in absolute terms than the delta of the Long Put. The net delta of the position is therefore positive. For this reason, this example uses positive delta thresholds on both the lower and the upper side.

4.4 Delta Exit on a Single Leg with Closing of the Entire Combo

Example: A Combo should be closed completely as soon as the delta of the Short Put Leg exceeds +30.
Condition: Delta Exit at Combo or Group level with Selected Leg selected. The desired Leg is chosen as the reference. The thresholds are defined for this Leg.
Meaning: OptionsApp monitors only the delta of the selected Leg. As soon as this Leg exceeds the defined delta threshold of +30, not only this Leg but the entire Combo (or Group) is closed.
Optionally, a second Leg can be added. In this case, the closing is triggered as soon as either of the two selected Legs reaches its respective delta threshold.