If you are using MT4 then you can change the magic number. MT5 does not use a magic number. To change the magic number right click on the smiley face, go to expert advisor, and click on properties. Double click on the magic number and you can then change it.
If you are using MT5 then right click on the blue hat, click on properties and you can change some of the parameters. I would suggest just changing the take profit and stop loss slightly.
Alan,