First see on the buttons above where on the center you probably have one active that is called "on Tick". So, blocks under "on Tick" works on every tick! That means if "Buy now" is executed again and again and again in every tick, you will go out of money in a very short period of time.
Please, check your "Welcome to fxDreema" project and see what is the block on the top.
By the way, note that MT5 is different than MT4. In MT5 if you buy 0.1 and then sell 0.1, you will end up with no position at all, because the buy is closed by the next sell. In other words, in MT5 you can have only one position at a time.