(doc) add comments to D3-Price-Chart.js
(doc) add comments to D3-Price-Chart.js

vinWin/pebbleframe,PebbleFrame/item-chimp,hsubox76/item-chimp,michaelcheng429/item-chimp,vinWin/pebbleframe,PebbleFrame/item-chimp,hsubox76/item-chimp,hsubox76/item-chimp,michaelcheng429/item-chimp