Macd values

Hi there

As far as I understand, Macd and Signal indicator values can be between -0.00200 and 0.00200

However when printing the values in backtesting, sometimes I'm getting values like these:

-3.21460655179381E-05

-2.70406524125052E-05

8.79575507714309E-07

I'm a bit confused... are these even integers, or? Why are these significnatly outside the expected values? Am I missing something. Where these "E-07" and "E-05" come from and what do they mean?

Thanks a lot in advance!

Cheers :)