Better Understanding for the MACD Sample

[Ben]

Hello to all and thanks for the help in the past

A couple of questions to understand the MACD Sample

1). MODE_MAIN = the base indicator line. This is the explanation inside the documentation stated here. This base indicator line is the cutoff point so to speak, for the upper and lower vertical lines in the histogram?

2). What actually is the MacdCurrent, and SignalCurrent?

3). What is the MACDOpenLevel referenced too? I understand that itis an external double. And that it is MacdOpenLevel 3 for default. But what is the 3 referenced from?

Just trying to understand the nuts and bolts.

Thanks for any help.

Huckleberry