Hi Jorge, thanks for taking some time off the Wall observer to comment here
However, I was confused for a while because the color key in some plots was incomplete (In the Order Book, for example, there was no key for the blue line.) Eventually it occurred to me that the key may be clipped off, and indeed the missing patches showed up one I widened the window to the full width of my display (1680 px).
Since some people will not have that many pixels, why not display the color key only once, vertically, on the right column? (The colors had better be the same for all plots, anyway, to make the charts easier to read.) It would also leave more space for the plots themselves.
Yeah, I am trying to figure out something better ; but I've been unsuccessful so far.
I am not sure about moving the key out of each chart box, this might not be visually appealing, and it would prevent individual screenshots...
You may consider also allowing the user to select which exchanges are to be plotted (if there is not such a feature already), perhaps up to a certain maximum. I would rather look at OKCoin or Huobi rather than BTC-China.
That's already possible ! You may select up to five exchanges ; unselect one of the five to be able to select another one.
Three features that I miss in BitcoinWisdom and you may want to add to beat the competition: volume in log scale (Eg. did Huobi grow exponentially since it opened?), a trade-by trade plot, like this and the ability to plot any past epoch with 1 minute resolution (which requires entering the start date-time with keyboard -- scrolling would be too cumbersome). Bitcoincharts has this.
OK for volume in log scale, I'll try to add it this week-end.
Not OK for trade-by-trade plot, this won't be easy to implement given the current data model.
Why not for epoch selection, it's actually available in the back-end; I still have to design a nice UI for that and patch a few things.
Another thing that may become very popular is a merged order book depth plot. Namely, merge the order books from all exchanges (with proper shifts and conversion factors) and then compute the cumulative sums. I believe this makes sense, since arbitrage effectively merges all exchanges into a single market -- so that, for example, a huge bid wall in China will block a price drop at Bitstamp.
Ah yes, it has indeed been requested by others ; might be available in two weeks.
Thanks again for the thorough feedback, have a nice week-end !
