function Init() { indicator.name("Wilders Trailing Stop indicator"); indicator.description("Wilders Trailing Stop indicator"); indicator.requiredSource(core.Bar); indicator.type(core.Indicator); indicator.parameters.addGroup("Calculation"); indicator.parameters.addInteger("Period", "Period", "", 5); indicator.parameters.addDouble("Coeff", "Coeff", "", 3.5); indicator.parameters.addGroup("Style"); indicator.parameters.addColor("UPclr", "UP color", "UP color", core.rgb(0, 255, 0)); indicator.parameters.addColor("DNclr", "DN color", "DN color", core.rgb(255, 0, 0)); indicator.parameters.addInteger("widthLinReg", "Line width", "Line width", 1, 1, 5); indicator.parameters.addInteger("styleLinReg", "Line style", "Line style", core.LINE_SOLID); indicator.parameters.setFlag("styleLinReg", core.FLAG_LINE_STYLE); } var first; var source = null; var Period; var Coeff; var ATR; var WTS=null; function Prepare() { source = instance.source; Period=instance.parameters.Period; Coeff=instance.parameters.Coeff; first = source.first()+2; ATR = core.indicators.create("ATR", source, Period); var name = profile.id() + "(" + source.name() + ", " + instance.parameters.Period + ", " + instance.parameters.Coeff + ")"; instance.name(name); WTS = instance.addStream("WTS", core.Line, name + ".WTS", "WTS", instance.parameters.UPclr, first); WTS.setWidth(instance.parameters.widthLinReg); WTS.setStyle(instance.parameters.styleLinReg); } function Update(period, mode) { if (period>first+Period) { ATR.update(mode); var loss=ATR.DATA[period]*Coeff; if (source.close[period]>WTS[period-1] && source.close[period-1]>WTS[period-1]) { WTS[period]=Math.max(WTS[period-1], source.close[period]-loss); WTS.setColor(period, instance.parameters.DNclr); } else if (source.close[period]WTS[period-1]) { WTS[period]=source.close[period]-loss; WTS.setColor(period, instance.parameters.DNclr); } else { WTS[period]=source.close[period]+loss; WTS.setColor(period, instance.parameters.UPclr); } } }