Events that have probable outcomes can produce consistent results, if you can get the odds in your favor and there is a large enough sample size.
[If casinos have a 4.5% edge on their customers, it translates to netting 4.5% on all money wagered there with that probability.]
[Technical analysis is mathematical, whereas mental analysis is psychological and uses technical indicators as a proxy for collective behaviour patterns.]
Each trade contributes to the market's position at any given moment, which means that each trader, acting on a belief about what is high and what is low, contributes to the collective behavior pattern that is displayed at that moment.
At the moment he puts a trade on, and for as long as he chooses to stay in that trade, other traders will be participating in that market. They will be acting on their beliefs about what is high and what is low. At any given moment, some percentage of other traders will contribute to an outcome favorable to our trader’s edge, and the participation of some percentage of traders will negate his edge. There’s no way to know in advance how everyone else is going to behave and how their behavior will affect his trade, so the outcome of the trade is uncertain. The fact is, the outcome of every (legal) trade that anyone decides to make is affected in some way by the subsequent behavior of other traders participating in that market, making the outcome of all trades uncertain.
Since all trades have an uncertain outcome, then like gambling, each trade has to be statistically independent of the next trade, the last trade, or any trades in the future, even though the trader may use the same set of known variables to identify his edge for each trade. Furthermore, if the outcome of each individual trade is statistically independent of every other trade, there must also be a random distribution between wins and losses in any given string or set of trades, even though the odds of success for each individual trade may be in the trader’s favor.
[Casinos don't need to predict the future to create consistent results: as long as the odds are in their favour, a large enough sample size will give their edge a chance to work.]
[For any pattern to be "exactly" the same as in a previous moment, exactly the same traders would need to be present with the equivalent mental state; therefore virtually impossible. So every market moment is unique even though it may rhyme with a previous occurrence.]
[Being aware of uncertainty and probabilities doesn't automatically translate to profiting from it.]
When you've trained your mind to think in probabilities, it means you have fully accepted all the possibilities (with no internal resistance or conflict) and you always do something to take the unknown forces into account. Thinking this way is virtually impossible unless you've done the mental work necessary to "let go" of the need to know what is going to happen next or the need to be right on each trade. In fact, the degree by which you think you know, assume you know, or in any way need to know what is going to happen next, is equal to the degree to which you will fail as a trader.
Traders who have learned to think in probabilities are confident of their overall success, because they commit themselves to taking every trade that conforms to their definition of an edge. They don't attempt to pick and choose the edges they think, assume, or believe are going to work and act on those; nor do they avoid the edges that for whatever reason they think, assume, or believe aren't going to work. If they did either of those things, they would be contradicting their belief that the "now" moment situation is always unique, creating a random distribution between wins and losses on any given string of edges. They have learned, usually quite painfully, that they don't know in advance which edges are going to work and which ones aren't. They have stopped trying to predict outcomes. They have found that by taking every edge, they correspondingly increase their sample size of trades, which in turn gives whatever edge they use ample opportunity to play itself out in their favor, just like the casinos.
[Typical traders avoid predefining risk because "it isn't necessary", which implies they believe that they can and do know what will happen, as well as that they're correct.]
When you're convincing yourself that you're right, what you're saying to yourself is, "I know who's about to come into this market. I know what they believe about what is high or what is low. Furthermore, I know each individual's capacity to act on those beliefs (the degree of clarity or relative lack of inner conflict), and with this knowledge, I am able to determine how the actions of each of these individuals will affect price movement in its collective form a second, a minute, an hour, a day, or a week from now."
[Watching a market with no intention to trade is frustration-free because nothing is at stake.]