During the standard flow, any transaction has its own unique exchange rate. Due to the volatile nature of the cryptocurrency market, ever-changing network fees, floating rates might change any other second. As a result, you might receive more or less than you thought you would.
A fixed exchange rate is a rate that totally matches the amount displayed to the user at the beginning of the exchange, independently from the further rate volatility. Due to the volatile nature of crypto, implementing fixed rates can be very risky for the exchange.
Both Changelly’s website and Changelly’s mobile app offers users a way to avoid exchange rate risk during the transaction interval.
To lock the rate, (which Changelly refreshes every 30 seconds), you need to shift the rate switch from Floating to Fixed position (as shown on the screen below) – that will activate the “fix rate” feature and guarantee the rate displayed on the screen. As soon as the transaction is created, a user has 15 minutes to send the money.