We've got one Alexandria node recording historical market data from Cryptsy, Bittrex, and Poloniex
http://florincoin.info/explorer/messages/I'll offer 70,000 FLO for anyone who builds an open-source web application (javascript would be a good choice) that can take an array of these JSON strings and turn it into a nice looking graph (using d3 or highcharts or something similar).
Example JSON string:
{"alexandria-history-record-datapoint":{"title":"FloMarketData","address":"FF9r36Ua3Ds4itz29hzbfqjkMpoTZ8HEqT","timestamp":"1435242572","api":"http://colorcoin.org:41290/flo-market-data/v1/getAll","unixtime":1435242563,"cryptsy":"0.0865","poloniex":"0.2139","bittrex":"0.6996","daily-volume":"190266.31250000","weighted":"0.00000751","USD":"0.00185"},"signature":"H2N9+nFzO/p2FB7QbzuvcwFbJV88pI9ocZdZGAERIs2/OrK5RZ658BlAPLqmIjT22rBYSAhS19AJFRwCxVoN/B4="}
If you want to run your own market data indexing program, check out
https://github.com/metacoin/flo-market-data -- the source code for the Alexandria node (the part that publishes to the blockchain) will be available soon.