Hi there,
for some days now the OHLC view shows weird colord candles like so:
http://fractal.bz/img/bug.pngI checked with several browsers, so it doesn't seem to be a problem on my end.
I actually liked the color change.
The red/green coloring is traditionally based on the daily open/close prices, which are important for stock traders since there is a long time gap (16 h or more) between successive candles. The close price gives the best estimate for the price during that gap, and the opening price reflects all the news that may have come out during the gap.
However, open/close are largely irrelevant for shorter or longer time intervals, of for markets (like bitcoin exchanges) that operate 24/7. In these situations, open and close prices are not particularly special, they are the prices of two random trades that happened to occur at particular moments. Individual trades are much less significant than the weighted mean of all trades in the interval. With bitcoin, it often happens that the mean price is steadily falling, but many of the candles are green; or vice-versa.
A more significant use of red/green coloring could be based on the weighted mean slope during the interval, found by lienar regression of the trade prices in that range, of from the diference of the mean prices in the two adjacent intervals. But I think that is superfluous: looking at the all-blue plot, it is obvious whether the price is rising, falling, or wandering about.
