And here is a comment that negates my theory completely and states that Log scale should be used for long term and linear for short:)
Chart Scales: Charts are graphed using two common types of scales: the arithmetic or linear scale and the logarithmic scale. There doesn't appear to be any overall benefit to using one over the other; trendlines, market patterns and indicators work with both of them. However, there may be a benefit to using the logarithmic scale for long-term charts (2-3 years or more) since trendlines tend to fit better.
Arithmetic (linear): chart scale that shows equal vertical distance for each unit of price change.
Logarithmic: chart scale that shows equal vertical distance for equal percentage moves; considered by some as more effective for long range trend analysis.
Going Long on a penny or a pinkie? Bad Choice - but you WILL learn the hard way! Most of the gurus on these message boards don't really have a pot to piss in! Just a lot of membermarks and perhaps a single wide! GOT FRONTLOADED?