The default Period lengths are recommended by the researches into Dimbeta. I find they work well for investing, but not for trading. If you want to use this to trade try setting both periods to 9 or 13 to get a more reactive oscillator.
@liorkeisar, Easiest way to do it is click on the "Add to Favorite Scripts" button if you want to use as is. The other way is to copy the code and paste it into Pine Editor when viewing a chart and saving it.