What is the meaning of the symbols that can be seen on the chart when the “Spread” strategy is operating?

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What is the meaning of the symbols that can be seen on the chart when the “Spread” strategy is operating?

: Strategy settings

When the Spread strategy works, you can observe the detection parameters on the chart (to do this, the Extended Debug Mode checkbox must be enabled on the Settings-Special-System tab):
TD: trade densityd
P: price fluctuation on the entire interval TimeInterval
Vol: volume
Spread: actual spread, percent
N: number of slices showing the spread (the last two appear on the chart only at detect time)

These values can also be found in the detect report.