SR does indeed use Mt.Gox 24 hour average. You can always put something in your cart, then see the price of btc on SR, then go to MT.Gox and see the up to the minute price it is trading at. There is also a great free app for the Iphone called bitcoin ticker. So if the current price on SR is $86 per coin....then you see on Mt.Gox it is 92.50 per coin...wait to order. If it is $82 on Mt.Gox ORDER NOW!! Also to the OP..when the person sent you the $1950 in btc you should have made sure you were online at the time the coins were sent as you would have had time to place the order at the same rate he sent you the coins at. If you missed it by a couple hours then yes you could have lost a couple hundred as 1850 is basically $90 a coin and so you were sent 90.5 coins. So when btc went to $88 you "lost" 180 bucks. With SR's system it does not go from 90 right to 88. It works its way down over many minutes...like an hour or two. As I am typing this message coin on SR is $90.08 on SR. On Mt.Gox it is $92.81 so if I was in a position that I needed to place an order... I would wait as i know for sure the price on SR will be going up before it go's down. Now if I was just transferring in the coin to my sr account...then I would not even be looking...I would just buy the item.. As I know I got my coins at going rate of SR......an example would be in your case...if you were on SR when your coins came in it would be $1950 in your account and you would just use the coins right away so they are worth exactly what you paid for. And that again is the only reason you got the coins in the first place. So many people in the forums are concerned about the price of the drugs they want with the coin going all over the place. If you happen to use your coins as soon as you get them, that would never affect you. As you should just buy what you intended to buy in the first place. Hope you understand what I was saying and you get your product for the price you paid for your coins. I know it is frustrating to a lot of people with the btc all over the place. But truth is. that if you put in some time to understand how it works and you take your time in doing things correctly you should NEVER have a problem. It just takes timing and understanding the Mt.Gox price vs the 24 hr average SR uses. In fact you will see that how SR does it is a great way for all of us as we don't see the dramatic changes the btc takes in short time. You actually have a few minutes to place an order and never get burned. And if you are lucky..you could even "make" a few bucks too!