message: Fix - reverse sign in difference calculation
diff: @@ -109,7 +109,7 @@ function viz(slice, payload) {
  // Time lag ratio
  v = reversedData[parseInt(c.timeLag, 10)][metric];
  if (c.comparisonType === 'diff') {
  - v -= recent;
  + v = recent - v;
  } else if (c.comparisonType === 'perc') {
  v = recent / v;
  } else if (c.comparisonType === 'perc_change') {
  