[3] Suggestion: Display calculated settlement price ratio between two active smartcoins in the market?

On a smartcoin's market page with the primary backing asset (USD:BTS, Hertz:BTS, XCD:bitUSD, etc) we display the settlement price which is useful as an indicator of market rates.

On smartcoin:smartcoin markets (such as USD:CNY, USD:Hertz, etc) we don't display a calculated rate between them despite sharing a common backing asset.

Could we not take the settlement price of both smartcoins, then work out the exchange rate between the two?

Perhaps it could help users place orders without having to go to xe.com (or another currency rate site) and manually calculate the rate themselves?

Start at the smartcoin market page and locate the existing settlement-price display for markets with a primary backing asset. Trace how the two smartcoin settlement prices are obtained, then define and display their calculated exchange rate on smartcoin-to-smartcoin markets. Done means the ratio appears for examples such as USD:CNY and USD:Hertz and helps users compare or place orders without external rate sites.

Written by the indexing model from the issue text.