Right now it's not possible, but I'll put it on my list of features to add. Unfortunately though, the play history Spotify provides is very innaccurate and incomplete - so suggestions only based on that would be quite limited :( It's the same issue with the statistics, they are best-effort based.
Having said that, there is another feature you could use: if you have or follow any playlists, you can include artists from them. Make sure to have the `Index Playlist Artists` option (it will get enabled automatically if you follow <100 artists) and tick `Include playlist artists` setting when creating your playlists.