//@Name:Zero Lag Study //@Description:Finds crosses in the Zero Lag Study //@Returns:Number //@Update:Periodic, 60 // Care has been taken in preparing this code but it is provided without guarantee. // You are welcome to modify and extend it. Please add your name as a modifier if you distribute it. //Coded by: Richard Chiesa, ShareScript Support var length = 32; var gainLimit = 22; var thresh = 1; var EMA, EC, alpha; function init() { //setTitle("Length=" + length + " GainLimit=" + gainLimit + " Thresh=" + thresh); alpha = 2 / (length + 1); } function getVal(share) { var data = getData(share, 15, 1, length*8); var ema = []; var ec = []; ema[0] = ec[0] = 0; var bestGain; var leastError; for (var i=1;iec[ec.length-2] && ema[ema.length-1]ec[ec.length-1]) return -1; else return 0; } function getData(share,dataType,useIntra,arrayLength) { if (dataType<15) { switch (dataType) { case 0: var dataPeriod = 1; break; case 1: var dataPeriod = 2; break; case 2: var dataPeriod = 2.5; break; case 3: var dataPeriod = 3; break; case 4: var dataPeriod = 4; break; case 5: var dataPeriod = 5; break; case 6: var dataPeriod = 6; break; case 7: var dataPeriod = 10; break; case 8: var dataPeriod = 15; break; case 9: var dataPeriod = 20; break; case 10: var dataPeriod = 30; break; case 11: var dataPeriod = 60; break; case 12: var dataPeriod = 120; break; case 13: var dataPeriod = 180; break; case 14: var dataPeriod = 240; break; } if (arrayLength) var daysNeeded = Math.ceil(dataPeriod * arrayLength/ 510); else var daysNeeded = 1; var eodData = share.getPriceArray(); if (eodData.length=0;i--) { tempData = share.getIBarArray(i,dataPeriod*60); if (tempData==undefined || tempData.length<1) continue; data = data.concat(share.getIBarArray(i,dataPeriod*60)); } if (data==undefined || data[0]==undefined || data.length<2) return []; } else if (dataType==15 && useIntra==0) var data = share.getPriceArray(); else if (dataType==16 && useIntra==0) var data = share.getWeeklyBarArray(); else if (dataType==17 && useIntra==0) var data = share.getMonthlyBarArray(); //daily else if (dataType==15 && useIntra==1) { var data = share.getPriceArray(); if (data.length<2) return []; var idata = share.getIBarArray(0,86400); if (idata!=undefined && idata.length==1 && new Date().getDate()==idata[0].date.getDate() && new Date().getDate()!=data[data.length-1].date.getDate()) { data[data.length]={ open:idata[0].open, high:idata[0].high, low:idata[0].low, close:(share.getIClose()==null?share.getIMid():share.getIClose()), volume:idata[0].volume, dateNum:idata[0].dateNum}; } } //weekly else if (dataType==16 && useIntra==1) { var data = share.getWeeklyBarArray(); if (data.length<2) return []; var idata = share.getIBarArray(0,86400); if (idata!=undefined && idata.length==1 && new Date().getDate()==idata[0].date.getDate() && new Date().getDate()!=data[data.length-1].date.getDate()) { if (idata[0].date.getDay()data[data.length-1].high?idata[0].high:data[data.length-1].high), low:(idata[0].lowdata[data.length-1].high?idata[0].high:data[data.length-1].high), low:(idata[0].lowtempData[tempData.length-1].high?idata[0].high:tempData[tempData.length-1].high), low:(idata[0].lowdata[data.length-1].high?tempData[i].high:data[data.length-1].high), low:(tempData[i].low