DVO: David Varadi Oscillator
In pdrano/IKTrading: Custom indicators, signals, and rules

Computes a percent ranking of an average of close over the sum of high and low values. The DV2 indicator uses an average period of 2.

1 2	DVO(HLC, nAvg = 2, pctLookback = 126, maType = "SMA", deTrend = TRUE, nDT = 126)

`HLC`	an HLC time series
`nAvg`	the number of days over which to average ratios
`pctLookback`	a percent ranking lookback period
`maType`	a function specifying the moving average type (defaults to SMA)
`deTrend`	whether or not to subtract an SMA of the indicator from itself
`nDT`	a lookback period for computing the moving average of the indicator to subtract from the center of the indicator, and then to subtract that quantity from the main computation