You may sort the table by time from 1 minute up to 1 month and you will choose the most and the least volatile pair for the period chosen.
Volatility is a statistical financial indicator, which characterizes price variability. It is an important financial indicator in financial risks management, where it is risk measure in the use of the financial instrument for the chosen period of time.
For volatility calculation may be used a statistical indicator of a sample standard deviation, which allows investors to define the risk of buying a financial instrument. In most cases annual average volatility is calculated. Volatility is expressed as a percentage from the initial price (for example: 100% ± 5%).