See where prices stand with respect to their historical ranges for the whole market
at a glance. The bottom of the white bar represents the low for the chosen time period (20-years, here)
as a percentage of the 20-year high. The top of the black bar represents the 20-year high as a
percentage of the 20-year high which is 100%. The line where the white bar meets the black bar
represents the current price as a percentage of the 20-year high.
For example, using the values for the British Pound on February 25, 2005,
| 20-year minimum: 105.45 |
| 20-year maximum: 200.32 |
| current price: 191.64 |
we get,
| minium percent | = (105.45/200.32) x 100% |
| = 52.64% |
| maximum percent | = (200.32/200.32) x 100% |
| = 100.00% |
| current percent | = (191.64/200.32) x 100% |
| = 95.67%. |
