Prayerful bears hoping Thursday morning’s selloff might be the beginning of something more satisfying had better take a look at the charts of such world-beaters as AMZN, AAPL, GOOG and MSFT.  All took the selling easily in stride, ending the day with the bullish flags on their respective charts undiminished in potency. Under the circumstances, the weakness appears to have been not merely harmless but constructive.  Looking just ahead, if this evening’s short-squeeze on index futures continues into the wee hours, it would make the prospect of new record highs within the next day or two all but a foregone conclusion.