# Exponential Moving Average (EMA)

> EMA (Exponential Moving Average) reacts faster to price changes than SMA and is used in Veles bots as a trend filter for directional trading.

An Exponential Moving Average (EMA) is a type of moving average that places greater weight on recent prices.
Unlike a [SMA](https://help.veles.finance/en/filters/sma/), an EMA reacts more quickly to changes in an asset's price, making it a popular tool for active strategies and Short trading.

## Trend detection using EMA

The EMA indicator is highlighted depending on whether the current price is above or below:

- **Price above the EMA line** → Buy-signal (open Long or close Short).
- **Price below the EMA line** → Sell-signal (open Short or close Long).

> ⚡ Due to its sensitivity, EMA is suitable for working on shorter timeframes and allows for faster response to market reversals.
> However, this same property makes it more susceptible to false signals.

## EMA Crossover with Price

When the current price crosses the EMA line, it may indicate a local trend change:

- **Top-to-bottom crossover** → signal to open a Short deal.
- **Bottom-to-top crossover** → signal to open a Long deal.

This method is often used in short-term trading to detect a breakout.

## EMA Crossover with EMA

One of the most well-known technical analysis patterns is the crossover of two EMAs with different periods.
The most commonly used are the 50 EMA and 100 EMA:

- **50 EMA crosses the 100 EMA from top to bottom** → Sell signal. This pattern is called the **Death Cross**.
- **50 EMA crosses the 100 EMA from bottom to top** → Buy signal. This is the so-called **Golden Cross**.

This filter is available in the Veles bot settings as **"EMA 50 crosses EMA 100"**.

## Timeframes and Practical Application

- The **smaller the timeframe**, the more signals the bot will receive, but the number of false signals also increases.
- On **higher timeframes**, EMA generates more reliable signals, suitable for medium- and long-term trading.

> 👉 There is no universal timeframe – choose periods that suit your trading style and test your strategy through [backtests](https://help.veles.finance/en/platform/components/backtests/).

## Limitations

- EMA is a **trend indicator** that shows the general direction of price movement.
- For increased accuracy, it is recommended to use EMA **in combination with other indicators** ([RSI](https://help.veles.finance/en/filters/rsi/), [MACD](https://help.veles.finance/en/filters/macd/), [ATR](https://help.veles.finance/en/filters/atr/)) and support/resistance levels.
- In Veles bots, EMA can be used as a filter for trade entry or exit, combining it with any other conditions.
- Due to its sensitivity, EMA is prone to false signals on short timeframes — always backtest before deploying.

## Using in Veles Bots (Flexible Indicator)

Available settings:

- Period - the number of candles for calculation. Range: 2–500, default 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.

## Summary

The EMA is a fast-reacting trend filter that adapts well to dynamic crypto markets. In Veles bots, it can define trend direction, detect crossovers, or build dual-EMA strategies like the Golden Cross — most effective when paired with a momentum indicator such as RSI or MACD.