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<p>[QUOTE=&quot;The Eidolon, post: 3733620, member: 102103&quot;]Between each what?&nbsp; A formula could give you a very good approximation of an existing relationship, but it does nothing to control the future.&nbsp; Ultimately, price will always be determined by the intersection of supply and demand.&nbsp; You could make a formula for a curve fit, for example, between prices of different grades of a coin, and it would be a good starting point.&nbsp; New information can slightly shift the demand curve as people have a closer idea of what something may be worth to other potential buyers.&nbsp; But relationships change over time, and so the formula will drift to become less and less accurate as new data makes it obsolete.[/QUOTE]</p><p><br /></p>

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