# Percentage Price Change

> % Price Change is a Veles filter that measures how much an asset's price moved over a timeframe and blocks trade entries during extreme volatility.

## % Price Change

The **"% price change"** filter checks how much the price of an asset has changed over the selected timeframe and allows the bot to enter a trade (or not) depending on this condition.

This is useful for:

- protecting against entering at the peak of a sharp rise,
- preventing trades from being opened during a strong downtrend,
- filtering out impulse movements.

Without specifying a custom value, the filter works as **"% price change, Greater than 0"**.

To set your own filter parameters, click the **Pencil** button in the settings.

### Example conditions

1. **% price change, 15 minutes, greater than 5**
   The bot will enter a trade after the green 15-minute candle closes if it rises by more than 5%.

2. **% price change, 5 minutes, greater than 1**
   The green 5-minute candle closes with a rise of more than 1% → entry signal.

3. **% price change, 1 minute, less than -1.5**
   The red 1-minute candle closes with a fall of more than 1.5% → entry signal.

4. **% price change, 1 minute, greater than -1**
   Red 1-minute candle drops less than 1% → entry signal is allowed; green candles are unlimited.

### Trade Entry Limitation

This filter is useful for cutting out unwanted signals:

- To prevent the bot from opening a trade during a sharp rise (protection against buying at the peak):
  **% price change, 1 minute, less than 0.5**
  → If the candle grows >0.5%, the bot will skip the entry.

- To prevent the bot from opening a trade during a sharp decline (protection against opening or averaging in the middle of the drawdown):
  **% price change, 1 minute, greater than -0.5**
  → If the candle falls deeper than 0.5%, entry will be blocked.

### Using as Exit Condition

:::tip
The filter can be used as a replacement for a Trailing stop.
For example: **% price change, 1 minute, less than 0** + **Minimum PnL**.
In this case, the bot will close the trade after the first red minute candle if the profit has already reached the minimum value.
:::

## % price change over N candles

Another filter option is to check the price change over several consecutive candles. You can select the number of candles: 5, 10, 20, 30, 50, or 100.

This helps take into account not only a single sharp movement but also the accumulated trend.

Click the **Pencil** to set the parameters.

:::note[Example]
You need to open a trade if the price has fallen by 3% or more in 10 minutes.
To do this, use the "% price change over 10 candles" filter with a 1-minute timeframe.
:::

## Using in Veles Bots (Flexible Indicator)

This indicator is a custom case of the **"Rate of Change"** indicator.

The **% price change** is the **Rate of Change** with a period of "1" compared to a constant.

The **% price change over N candles** is the **Rate of Change** with a period of "N+1" compared to a constant.

Available settings of "Rate of change":

- Period - the number of candles for calculation. The default value is 9.
- Interval - the candle timeframe.
- Method - the calculation type. By bar close (only on the selected interval) or by minute (once per minute for any interval).
- Shift - shifts the requested indicator value back by the specified number of candles.