An edge gives you high probabilities of winning over a large enough data set. You can have numerous edges on one trade. Take today for example: 1.) Edge #1 Historically last Friday was the largest # of consecutive down days in 36 years, unlikely to carry further. 2.) The traders almanac has the day prior to the election having been up 81% of the time since 1952. 3.) You had a large gap up with advancing volume 30 minutes into the open at 10-1, the chances of a trend day were very high, meaning a big up day closing at the highs 4.) The puts were at highs not seen since Sept 2015 - the sentiment was overly bearish - once again unlikely to sustain. The edge comes from lining up as many high probability events as possible and pressing the winners with size while cutting the losers off - knowing when you to get out and wait for an edge to occur, and most importantly having a real good risk mgmt. This video shows how a pro gamble takes a small edge to take down a few Casino;s - same applies to trading.