a good and popular one is
http://preev.com although a bit limited in the choices offered.
This is the best so far and the most popular and widely used here in the forum. Is this your own website though? I'm just curious mate. One advantage though is that is has a bitcoin chart and you will see historically the wild price swings of bitcoin. Other than that, it mostly looks like preev with different background color. How do you get the formula for calculating though? You getting all the average from trading platforms?
Thanks for the share though, simple but effective.
Not mine. I use this website usually to check everything I need about VPNs. They post daily blog posts which VPN is good for bunch of apps like Netflix, for gaming,etc. Good thing they got user reviews for every VPN and a lot of coupons I already used. I recently found out they got this exchanger.