touch-tooltip-fix.js

Highcharts.Chart.prototype.callbacks.push(function(chart) {
  var hasTouch = document.documentElement.ontouchstart !== undefined,
      mouseTracker = chart.pointer,
      container = chart.container,
      mouseMove;
 
  mouseMove = function (e) {

    // let the system handle multitouch operations like two finger scroll
    // and pinching
    if (e && e.touches && e.touches.length > 1) {
      return;
    }

    if (hasTouch) {
        if (e && e.touches && e.touches.length > 1) {
            mouseTracker.onContainerTouchMove(e);
        } else {
            return;
        }
    } else {
      mouseTracker.onContainerMouseMove(e);
    }
  };
  
  click = function (e) {
    if (hasTouch) { 
        mouseTracker.onContainerMouseMove(e);      
    }
    mouseTracker.onContainerClick(e);    
  }
 
  container.onmousemove = container.ontouchstart = container.ontouchmove = mouseMove;
  container.onclick = click;
});

In v4.x (only tested with 4.1.4 on Android), pinch zooming doesn't work correctly. Fix for 4.x is in the following gist:
https://gist.github.com/sehv/928f356afd6b68eb28e2