# Dynamic Balance %

As the Custom Balance grows, the EA can gradually increase position sizes (because many calculations use that balance).

**Prerequisite:** [**Custom Balance**](/smartchoise-manual/options/custom-balance/custom-balance-chart.md) **must be enabled.** If Custom Balance is disabled (0), the EA uses the real account balance and Dynamic Balance % has no effect.

If [**Custom Balance**](/smartchoise-manual/options/custom-balance/custom-balance-chart.md) is set (greater than 0), and Dynamic Balance % is:

As the Custom Balance grows, the EA can gradually increase position sizes (because many calculations use that balance).

* **Set to a value greater than `0`**:  When the EA makes profit, it will **add the selected percentage of that profit** to the Custom Balance.\
  This lets you compound gradually without manually updating your [Custom Balance](/smartchoise-manual/options/custom-balance/custom-balance-chart.md).
* **Set to 0** (disabled ):  No profit is added to the [Custom Balance](/smartchoise-manual/options/custom-balance/custom-balance-chart.md):
  * Custom Balance stays fixed
  * Lot size stays more consistent over time
  * Risk does not increase due to compounding

{% hint style="info" %}

## How the calculation works (simple)

Each time the EA closes profit, it updates the Custom Balance like this:

**Custom Balance (new) = Custom Balance (old) + (Profit × Dynamic Balance % / 100)**

Only **a portion of profit** (based on your % setting) is added. If the trade/sequence didn’t end in profit, there’s nothing to add.
{% endhint %}

{% hint style="success" %}

## Examples (super clear)

#### Example A — Dynamic Balance % = 100

If set to **100**, then **100% of profit** will be added to Custom Balance.

* Custom Balance starts at **$1,000**
* A trade closes with **+$10 profit**
* Added to Custom Balance: **$10 × 100% = $10**
* **New Custom Balance = $1,010**

#### Example B — Dynamic Balance % = 50

If set to **50**, then **50% of profit** will be added to Custom Balance.

* Custom Balance starts at **$1,000**
* A trade closes with **+$10 profit**
* Added to Custom Balance: **$10 × 50% = $5**
* **New Custom Balance = $1,005**
  {% endhint %}

#### Quick comparison

| Dynamic Balance % | Profit | Added to Custom Balance | Result (if starting at $1,000) |
| ----------------- | ------ | ----------------------- | ------------------------------ |
| 100               | $10    | $10                     | $1,010                         |
| 50                | $10    | $5                      | $1,005                         |
| 20                | $10    | $2                      | $1,002                         |
| 0                 | $10    | $0                      | $1,000                         |

{% hint style="warning" %}

### Risk note (important)

* **Higher % = faster growth → higher risk over time**
* **Lower % = slower growth → more stable risk**
  {% endhint %}

{% hint style="info" %}

### Reset behavior

The profit used for compounding is **not reset automatically**. It only resets if:

* the EA uses a **different Magic Number**, or
* you click the **Reset** button in the panel
  {% endhint %}

{% hint style="info" %}

### Recommended usage (plain-language guidance)

* Want the EA to behave like it’s always trading a “fixed-size account”? → set **Dynamic Balance % = 0**
* Want controlled compounding without surprises? → use a **smaller %** and increase only after you’re confident with the exposure.
  {% endhint %}

{% hint style="warning" %}
Always match your **risk level to your comfort** when using compounding!
{% endhint %}


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