Improve Chart-Generation

[deveth0]

Hi,

just a hint: there is an easier and faster way to generate the charts for exchanges:

you can use the json access to bitcoincharts.com which accepts the following parameter: http://bitcoincharts.com/charts/chart.json?m=mtgoxUSD&r=1

m= exchange r= days in past

This api gives you a preordered and filtered array of values, which are sufficient to generate a chart. As those are only a low number of values, the performance should increase dramatically ;)

greetz Alex (using this in next release of https://play.google.com/store/apps/details?id=de.dev.eth0.bitcointrader)

[veken0m]

Thanks for the tip! I've been looking for ways improve graphing performance and didn't know this was available on BitcoinChart's API. Perhaps this should also be added to the BitcoinCharts module in XChange?

Is there documentation on how to interpret the data?

Really sick app btw, seems like I have some catching up to do :). Good luck!

[deveth0]

There is no official documentation of this data, but i contacted the creators and they told me, it's ok to use. The values are in this order: date open high low close volume volume Currency weighted Price

I already extended the xchange module, but it's kind of bad code which is not conform with the xchange stuff, so i didn't commit it yet. hope i find time to rebuild it.

Why catching up? I really like your app to get information and don't think, our apps rival but complement each other :)

[veken0m]

Awesome thanks!

It's true that our apps don't really rival each other but features such as trading, wallet and account info are some features I've always wanted to implement but never had the time. Also my UI is looking pretty outdated XD

[deveth0]

It's not "outdated" it's oldschool ;)

Edit: i commited the code to my fork: https://github.com/deveth0/XChange/tree/advanced-bitcoinchart-data