ΣL Signal Rating System

This article looks at how we differentiate periodic signal classes on Sigma-L. This is a helpful resource to refer to when interpreting the time frequency plots presented in our market reports.

‘A’ Class

Highly amplitude stationary for the majority of the sample
Highly frequency stationary for the majority of the sample
Maximum gain per frequency across the frequency range and within the bandwidth of the signal, within the sample timeframe
Clear spectral spacing around the signal

Copper (HG), a typical wow! signal demonstrating a beacon like quality across the time and frequency range sampled. Highly amplitude and frequency stationary with no other periodic signal of note coming anywhere near it’s clarity.

‘B’ Class

Highly amplitude stationary for at least half of the sample
Highly frequency stationary for at least half of the sample
Maximum or second highest gain per frequency across the frequency range and within the bandwidth of the signal, within the sample timeframe
Clear spectral spacing around the signal

An example of a ‘B’ class signal in XAU/XAG. Some mild frequency and amplitude modulation, the most typical signal we will likely see in the snippets - an excellent component to note for subscribers.

‘C’ Class

Highly amplitude stationary for at least half of the sample
Highly frequency stationary for at least half of the sample
Maximum or second highest gain per frequency across the frequency range and within the bandwidth of the signal, within the sample timeframe

The 80 day component in GBPUSD with a good degree of stationarity but less defined spectral spacing, a typical ‘C’ class signal

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