Why do I receive a message about requotes when opening a transaction?

In case of high volatility of financial markets (for example, during a  news release), requotes (server’s offers of a new price which is different from the price of your inquiry) are probable at the attempt  to open/close a position.
To avoid this situation you can use the "Enable maximum deviation from quoted price" option in the window of  the position opening/closing. By adjusting certain value, you automatically open a position with a new price unless the deviation of the new price from the required price is higher than the fixed amount.