Add legend to the chart about techan.js HOT 1 OPEN

function move(coords) {
  var index = financetime.invertToIndex(coords[0])
  // Map the index to your calculated moving average. Set the legend data
  var legendSelection = d3.selectAll('text.legend').data(smaArrays.map(function(d) { 
    // smaArrays is an array of arrays
    return d[index].value;  // Take into account SMA preroll when converting index to value
  });

  legendSelection.enter()
    .append('text')
      .classed(function(d, i) { return 'legend sma-' + i; }); // define classes to match SMA colors

  legendSelection.text(function(d) { return 'SMA: ' + d; });
}

crosshair.on("move", move);