# MACD-V Histogram
The MACD-V Histogram is a natural extension of the work done on the [the MACD-V](https://chartschool.stockcharts.com/table-of-contents/technical-indicators-and-overlays/technical-indicators/macd-v).
The MACD-V Histogram is constructed using the following formula.
```
MACD-V = [(12-period EMA – 26-period EMA)/ATR (26)] * 100
Signal line = 9-period EMA of MACD-V
Histogram = MACD-V – Signal Line
where
EMA = exponential moving average
```
1. **RISK.** The market is considered to be in short-term risk (oversold) when the MACD-V Histogram is < -40
2. **RISK.** The market is considered to be in short-term risk (overbought) when the MACD-V Histogram is > 40
## Using MACD-V Histogram in StockCharts ACP
The MACD-V Histogram is available as a standard indicator in StockCharts ACP. To access it:
1. Select Chart Settings
2. Scroll down the list of Standard Indicators and select MACD-V Histogram
3. You can change the MACD-V Histogram parameters by selecting the settings icon next to the indicator name.
MACD-V Histogram applied to SPY in StockChartsACP
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