well i don't know what is trading by chance stands for... a chance for me means we already know by analysis that it is correct time to enter the market, chance more like opportunity for surely gain profit from entering market, while analysis seems as preparation collecting useful data or signal to be used as trading decission... so in this case i will choose trading by chance because it is related to good moment of trading after get some convincing data from analysis
i can not argue with this, i just remember some words that said chance is not awaited chance is created, yes chance is a moment that we know it will make us benefit, chance comes when we already know that certain news will release as expected and our technical analysis generate same moment as fundamentals did