MACD histogram crossover point

[Paul <rivatrading@xxxxxxxxx>]

Hi All,

I am having no luck trying to code the following idea.

What I want to know is what price is needed to make MACD Histogram = 0

So if today the MACD Histogram is positive ... how far down does the market 
have to close to make MACD Histogram = 0

or

if today the MACD Histogram is negative ... how far up does the market have 
to close to make MACD Histogram = 0

If anyone has any idea would you please email and let me know.

Regards,
Paul