someone help who knows statistics. How can one trade on it and not get confused with different periods of time the calculation is based upon.

Balance volume in the Forex works the same as moving averages. As trading volume in a particular currency increases, the trend is that the currency will increase further. For more information, check out this site: http://www.forexvendors.com. This site helped me to understand the basics to the Forex, and offered other resources to help me trade better.Hope this helps...