Is there an explanation for this phenomena?  Perhaps I'm ignorant on something.  The oldest sell in the images below for 30 BTC shows green on BitcoinWisdom, but red on Moody.  I watched it happen, it was a sell.  You can see it happen a few more times in just these two images.


I see this happen with the candles and volume bars at times, too.  I watched a 1,424 LTC/USD buy go through on btc-e a few days ago and it grew a red volume bar and candle on BitcoinWisdom.  I believe this is to do with the difference in Candlestick HLC vs Candlestick, though I wanted to mention just in case there is a correlation with the transaction history colors.
BitcoinWisdom mark if the price great than previous price then it is green, if the price less than it is red, if equals then the color is the same as previous trade instead of bid is green and ask is red.
BTC-e's stick equals CandleStick+30m. CandleStick is short alias of CandleStickOHLC(Open High, Low, Close). CandleStickHLC(High, Low Close) keep the price continous.