before we take long or short, we need to know if the overall market is bullish or bearish, my question is : how do you detect / identify the bullishness or bearishness of overall market. thank you for sharing your experience or method.

The most complete is without any doubts the use of heatmaps as produced by finviz;

Stock Market Map Heatmap

or Barchart:

Futures - Futures Heat Map