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Ehlers Signal-to-noise Ratio
Summary: This is a volatility indicator created by John Ehlers and published in his book ’Rocket Science for Traders, p81-82.’
Info:
The Signal To Noise Ratio was authored by John Ehlers; it is derived from his Hilbert Transform Indicator. Highs, lows, Eulers logarithms, factors and feedback are applied to Hilbert's complex number calculations to produce this indicator's amplitude value.
This indicator will show the asset's level of volatility and provide possible buy and sell entries.
If the indicator crosses over the zero line then the asset is volatile. For a consolidating market, the indicator will be below the zero. The color of the indicator shows potential buy and sell entries: green for buy and red for sell.
The length of the transform and the period can be changed by locating and opening the Javascript Code under Data Building Procedure -> Procedure Loop under ’Ehlers Signal to Noise’ Product Definition.
The zero line could also be changed to 6 or higher to provide more conservative trend threshold. This is done in the plotter under Ehlers Signal to Noise plotter -> SNR Shapes -> Chart Points -> Zero Begin/End -> Point Formula
Products & Properties
The following properties are available to access:
| Product Name | Product Variable | Properties |
|---|---|---|
| Polus-Ehlers-SNR | EhlersSignalToNoise | snr, h1, smooth |
Example:
A simple strategy could be built to open a trade when the indicator rises above the threshold value and the signal turns green:
chart.at24hs.EhlersSignalToNoise.previous.snr < 6 && chart.at24hs.EhlersSignalToNoise.snr > 6 &&
chart.at24hs.EhlersSignalToNoise.h1 < chart.at24hs.EhlersSignalToNoise.smooth Maintainer:
Polus Data Mine — TOC
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2. Fisher MFI
5. Keltner Channel - MAMA version
6. Keltner Channel - EMA version
10. Volatility Adjusted Moving Average
12. Volatility Bands
13. Ehlers Signal-to-noise Ratio