Debug My Bot player
My new suggestion is Debug My Bot player.
Idea: record every click (move, change odds, last traded prices, ...) and save as file which Debug My Bot player will be able to play (continuously, with own refresh rate). Something like "save output data to file".
It is for very comfortable testing bots, features, strategies. Within minutes, I'll know whether the new strategy (or bot) has a chance to succeed.
(awesome feature will be possibility to record from real markets, from real selections)