Bulls v Bears

Here is an example from Tradovate and the code

// VolumeBullsBears v1.3 2021-06-01 JackieW // Description: // A Tradovate custom volume indicator which attempts to infer the amount of buying // and selling pressure within a candle. For a given time slice of an asset, the amount // of buying (or bullish) pressure is rendered in green while the amount of selling (or // bearish) pressure is rendered in red. The full height of the histogram represents // total volume. An simple moving average volume line is also plotted in yellow. const predef = require("./tools/predef"); const meta = require("./tools/meta"); const p = require("./tools/plotting"); const SMA = require("./tools/SMA"); const defaultBearColor = "#F23051"; const defaultBullColor = "#3EB242"; const defaultVolAvgColor = "yellow"; const defaultVolAvgPeriod = 20; const defaultLineWidthPx = 3; class volumeBullsBears { init() { this.smaAlgo = SMA(this.props.volAvgPeriod); } map(d) { const volume = d.volume(); const close = d.close(); const high = d.high(); const low = d.low(); const range = high - low; const bulls = Math.round(volume * (close - low) / range); const bears = Math.round(volume * (high - close) / range); // use bid/offer volumes //const bulls = d.offerVolume(); //const bears = d.bidVolume(); return { volume: volume, bears: bears, bulls: bulls, volAvg: this.smaAlgo(volume) }; } } module.exports = { name: "volumeBullsBears", description: "Bulls vs Bears", calculator: volumeBullsBears, tags: [predef.tags.Volumes], inputType: meta.InputType.BARS, areaChoice: meta.AreaChoice.NEW, params: { volAvgPeriod: predef.paramSpecs.period(defaultVolAvgPeriod), }, plots : { volume: {displayOnly:true}, bears: 'bears', bulls: 'bulls', volAvg: {title:'VolAvg'}, }, plotter: [ { type:'histogram', fields: ['volume', 'bears','bulls'] }, predef.plotters.singleline("volAvg") ], schemeStyles: { dark: { volume: {color: defaultBearColor}, bears: {color: defaultBearColor}, bulls: {color: defaultBullColor}, volAvg: {color: defaultVolAvgColor}, } }, };