Conversion of Tiki Scalper indicator from NinjaTrader

Hi everyone,

Wondered if anyone would be able to help convert this NinjaTrader code for an indicator into Prorealcode?

const predef = require('./tools/predef')

class tikiScalper {
    init() {
        this.isBuy = true
    }

    map(d, i, history) {
        if (i < 5) {
            return
        }
        
        const close = d.close()
        const priorClose = history.get(i - 1).close()
        const priorPriorClose = history.get(i - 2).close()
        const priorPriorPriorClose = history.get(i - 3).close()
        
        const isBuy = priorClose < close && 
            (priorPriorClose < priorClose ||
            priorPriorPriorClose < priorClose) 
        
        const isSell = priorClose > close && 
            (priorPriorClose > priorClose ||
            priorPriorPriorClose > priorClose) 
            
        if (isBuy) {
            this.isBuy = true 
        } else if (isSell) {
            this.isBuy = false
        }
        
        const {
            upColor,
            downColor
        } = this.props
        
        const color = this.isBuy ? upColor: downColor
        
        return {
            candlestick: {
              color
            }
        }
    }
}

module.exports = {
    name: 'tikiScalper',
    description: 'Tiki Scalper',
    calculator: tikiScalper,
    params: {
        upColor: predef.paramSpecs.color('lime'),
        downColor: predef.paramSpecs.color('red'),
    },
    tags: ['Tiki Tools']
}

Many thanks,

Jim