Those operators are meant to be used inside expessions and not really that useful in this case.
You can make an event block into an OR block by adding two conditions (in your case 4), then selecting the event block and pressing Y on the keyboard. (or right click)
You could also check if the variable is less than 5 by adding a "System -> Compare variable" condition and selecting "Less than" in the dropbox.
There are many ways to do it, but those should do the trick for you.