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stochasticOscillator.src.js
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stochasticOscillator.src.js
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var values = [],
label,
maLabel;
function getRunUpCount (periods, smaPeriods) {
return smaPeriods;
}
function getBufferSize (periods, smaPeriods) {
return periods;
}
function validate (periods, smaPeriods) {
if (typeof periods !== "number") {
error("Stochastic Oscillator periods must be a number");
}
if (periods % 1 !== 0) {
error("Stochastic Oscillator periods must be an integer");
}
if (periods > 100) {
error("Stochastic Oscillator maximum period is 100");
}
if (periods <= 0) {
error("Stochastic Oscillator periods must be greater than 0");
}
if (typeof smaPeriods !== "number") {
error("Stochastic Oscillator smaPeriods must be a number");
}
if (smaPeriods % 1 !== 0) {
error("Stochastic Oscillator smaPeriods must be an integer");
}
if (smaPeriods > 100) {
error("Stochastic Oscillator maximum period is 100");
}
if (smaPeriods <= 0) {
error("Stochastic Oscillator smaPeriods must be greater than 0");
}
}
function onStart (periods, smaPeriods) {
label = "Stochastic Oscillator (" + periods + ")";
maLabel = "Stochastic Oscillator (" + periods + ") " + smaPeriods + "-Period Moving Average";
}
function getStudyAxisConfig () {
return {
min: 0,
max: 100,
tickPositions: [0, 20, 80, 100]
};
}
function onIntervalClose (periods, smaPeriods) {
var closes = prices(periods),
periodLow = Math.min.apply(null, closes),
periodHigh = Math.max.apply(null, closes),
value = ((CLOSE - periodLow) / (periodHigh - periodLow)) * 100;
values.push(value);
if (values.length < smaPeriods) {
return null;
} else if (values.length > smaPeriods) {
values.shift();
}
return [{
overlay: false,
name: label,
value: value,
tooltip: {
valueDecimals: 1
}
}, {
overlay: false,
name: maLabel,
value: Math.average(values),
tooltip: {
valueDecimals: 1
}
}];
}