Hi,

We want to add stacks in reverse order without touching legends order. I tried to dig into code and found that while (i--) unconditional
you can add new property so that generic solution can be applied

Code as in 3.0.7

   /**
   * Build the stacks from top down
   */
   buildStacks: function () {
          var series = this.series,
                 i = series.length;
          if (!this.isXAxis) {
                 while (i--) {
                       series[i].setStackedPoints();
                 }
                 // Loop up again to compute percent stack
                 if (this.usePercentage) {
                       for (i = 0; i < series.length; i++) {
                              series[i].setPercentStacks();
                       }
                 }
          }
   },

Proposed code with new property

buildStacks: function () {
var series = this.series,
i = series.length;
if(!this.isXAxis)
{
if(this.stacksBottomUp)
{
for(i = 0; i < series.length; i++)
{
series[i].setStackedPoints();
}
}
else
{
while (i--) {
series[i].setStackedPoints();
}
}

          // Loop up again to compute percent stack
          if(this.usePercentage)
          {
                 for(i = 0; i < series.length; i++)
                 {
                       series[i].setPercentStacks();
                 }
          }
   }

},

Thanks,
Ashish