The charts are straight off the internet --- Live Gold Price
This site uses a Java plug-in, which isn't supported on Google Chrome. You'll have to use Firefox (or possibly Opera) to run the charting package.
I use a screen-capture program (Snagit) to capture, crop, re-size, etc. the portion of the chart I want to post to the forum. And I use that program to add text, arrows, shapes, highlights, etc. to the chart. Then, I save it to one of the Screen-Shots files on my computer, upload the file to Photobucket, copy the IMG from Photobucket and upload it to the forum. It sounds tedious, but it's really just a bunch of mouse-clicks.
The goldprice.org charting package is fairly robust. In addition to gold, silver, platinum and palladium spot prices, the package offers gold and silver prices in half a dozen different currencies, the US dollar index, oil prices (Brent and WTI), and 25 or 30 currency pairs. They have the usual indicators and tools, and price overlays are fast and easy.
I dabble in physical gold bullion for fun and profit, so I primarily watch the NY spot gold price, rather than futures prices (or the XAU/USD on forex platforms). The goldprice.org site serves me well in my "dabbling" sideline.
Also, goldprice.org is accessible 24/7. So, if your forex platform is closed for some time on the weekend, you can check forex prices and do forex chart studies on the gold site.
Check it out. I think you'll like it.