I do not think there are bots trading Dash. I know I personally have been buying a lot of Dash this past week, and likely others have been doing the same. There is no historic trade data available to build a good bot trader
To be honest, this is not the first time... It happened to me on Cryptsy, and that was definitely ruled by bots ! those 0.00xxx buys and sells, fake sell/buy walls. It happened to me also before, that price went from very low point, to point where I previously bought, just right after I sell coins...