But APMEX is way higher than any other. I have been tracking prices for a couple weeks now. APMEX is consistently higher by 20-30 cents
I hope the link works, off the home Kitco page.
May be, your own refresh rate, or the refresh speed of each web site. Markets (paper contracts) move at micro second speeds. Each site updates at intervals measured in minutes sometimes as much as 15 min. To as fast as 2 min. The whole world of paper can change in 15 min. There is for sale software that you can purchase if you want to become a day trader. But your still at the mercy of your own processor speed. (Intel pentium ?).