How do I sell the highest price of a currency and how to convert my electronic currencies to dollars at the best price?

We all know that currencies are not fixed and from here we can make profits by selling at the highest price before landing.
When the price starts to fall, we will look for the best selling price at it.
The price may differ from one platform to another, so we can take advantage of price differentials for platforms. Platforms that differ in price from other platforms are the yobit platform (https://yobit.io/?bonus=JTutM) where this platform has higher currency rates than any other platform We can use them to sell and achieve the best price.
The other benefit is to convert our currencies into dollars and convert them to one of the following banks directly from the platform without an intermediary
Payeer
AdvCash
PerfectMoney
Thus capitalizing at the best possible price.
In addition to daily investment features and free currencies.
It should be noted not to risk large quantities of founder because the platform is not known who is its founder is full of imaginary currencies, so be careful to deal with science to the platform is good and works perfectly ..