once merge process has completed usually 10GB for about 6-8hrs depending on Graphics card speed
then you get message "Waiting for new chains"
which means chains were merged and job is done .
but search for random CW's like this may not bring instant success unless you have merged about 150-300GB of chain files first ,
which will take at least a few weeks i would imagine .
plus when random search CW's you must wait maybbe 45secs or so for it to find just 1 CW ..and then let it search the full list of 10 random CW's to see what kinda success your having .