There is no "must go up" or "sure win". There is only: the average outcome of a decision, repeated many times.

This sounds obvious, but most retail traders never truly accept it — they think about "this bet", not "one thousand bets".

EV = Σ (probability × outcome). Every decision can be written this way. Positive-EV decisions deserve repetition; negative-EV decisions must stop, regardless of how the current one turns out.

Betting handicaps, trading stops, position sizing — all of these are just adjustments to terms in this equation.

Assume you have a 20% edge (which is already very high) and bet 50% of your account each time — math can prove you will eventually go broke.

Kelly gives the maximum sustainable fraction; in practice, use half of it. You always overestimate your own edge.

"This stock should bounce" — that is prediction. "This stock broke above its 50-day MA on rising volume" — that is observation.

A trend trader's job is not to be smarter than the market, but to be more disciplined than the market at following pre-written rules.

10% annual return, for 30 years, multiplies by 17. Avoiding one big loss each year matters far more than earning one small extra win.

Most retail traders do not suffer from earning too slowly — they suffer from blowing up every few years, resetting all prior compounding to zero.