Hi...
As of today's trend, Gold is currently on a sideways movement and its not recommended to trade in gold at this time.
The best would be to trade when Gold at MCX either touches 17110 (which is currently the Resistance Level) because once it goes higher than 17110, it can be said that then it would go higher further.
And if Gold reaches as low as 16650 (which is currently the Support Level) then it is expected to further go down till 16200. So then would be the real time again to trade.
Further, even if you are looking from the point of long term investment. I would suggest you to wait as the Gold might go as low as 15500 to 16000 in coming months, so that is when you can start investing money, either through ETF, or through Gold on MCX / NCDEX, I would suggest Gold through MCX because your earnings maximize when you trade on Margins.
Hope that helps.
Regards
Deep S