robustify is-candlestick check in setAutoType

Author: etpinard

src/plots/cartesian/axis_defaults.js

@@ -203,11 +203,13 @@ function getBoxPosLetter(trace) {
 }
 
 function isBoxWithoutPositionCoords(trace, axLetter) {
-    var posLetter = getBoxPosLetter(trace);
+    var posLetter = getBoxPosLetter(trace),
+        isBox = Registry.traceIs(trace, 'box'),
+        isCandlestick = isBox && Registry.traceIs(trace._fullInput || {}, 'candlestick');
 
     return (
-        Registry.traceIs(trace, 'box') &&
-        trace._fullInput.type === 'box' &&
+        isBox &&
+        !isCandlestick &&
         axLetter === posLetter &&
         trace[posLetter] === undefined &&
         trace[posLetter + '0'] === undefined

src/traces/candlestick/index.js

@@ -15,7 +15,7 @@ module.exports = {
     moduleType: 'trace',
     name: 'candlestick',
     basePlotModule: require('../../plots/cartesian'),
-    categories: ['cartesian', 'showLegend'],
+    categories: ['cartesian', 'showLegend', 'candlestick'],
     meta: {
         description: [
             'The candlestick is a style of financial chart describing',