How true is this?
Quote from FredBloggs:
depends how good your edge is, and your experience.
i think it was either neiderhoffer or teweles (the futures game) who refers to a study of brokerage accounts. the findings were indeed that commissions and spread (which were much larger when the study was conducted) are the reasons most lose over time as they gradually eat into the profits of strategies with a small edge.
Quote from cactus_trader:
1. only trade when you have an edge
2. most over trade/trade out of being bored
3. it still all boils down to edge per share traded
