Petrol Price keeps falling; where is it heading to?

Petrol prices have fallen by almost a third in the past two year and are expected to keep falling as oil producing nations boost production. But how far it will go, and will there be a reversal? And how do the retail prices in Australia are decided? Mr. Jerry Willams, 'Senior Resources and Energy Analyst' from the Australian government Department of Resources, Energy and Northern Australia, explains this.

Source: AAP