TensorCharts Price Voice Update Script

PRICE_VOICE_UPDATE.js

// Settings
var changeThresholdPct = 1.0; // Notify by voice when the price moves up or down this percentage
var beepChangeThresholdPct = 0.25; // Notify with a beep when the price moves up or down this percentage

// Scopes
var lastPx = self.lastPx;
var beepLastPx = self.beepLastPx;

if(trades.length!=0){
  var currentPx = trades[0].Price;

  // First run, only set the lastPx
  if(lastPx == null || beepLastPx == null) {
    self.lastPx = currentPx;
    self.beepLastPx = currentPx;
  } else {
    var changePct = Math.round((((currentPx / lastPx) - 1.0) * 100) * 100) / 100;
    var beepChangePct = Math.round((((currentPx / beepLastPx) - 1.0) * 100) * 100) / 100;
    
    if(changePct > changeThresholdPct || changePct < -changeThresholdPct) {
      if(changePct > 0) {
        speak("Up " + changePct + "%, trading @ $" + currentPx);
      } else {
        speak("Down " + changePct + "%, trading @ $" + currentPx);
      }

      self.lastPx = currentPx;
    }
    
    if(beepChangePct > beepChangeThresholdPct || beepChangePct < -beepChangeThresholdPct) {
      var numBeeps = Math.min(Math.round(Math.abs(beepChangePct) / beepChangeThresholdPct), 10); // Ring up/down how many "threshold ticks" changed
      var beepType = 2; // Default negative beep
      
      // Positive beep
      if(beepChangePct > 0) {
        beepType = 1;
      }
      
      for(var i = 0; i < numBeeps; i++) {
      	setTimeout(function() { beep(beepType); }, i*100);
      }

      self.beepLastPx = currentPx;
    }
  }
}