Many of the various debates here in the forums seem to be based largely on semantic arguments, and I'd like to add my 2 cents (or less) here:
Rather than applying the word "prediction" to trading approaches, I'd suggest that the word "expectation" is generally more appropriate, particularly in the mathematical, probabilistic sense. Even when rigorous math/statistics is not applied (as it might be say, in algorithmic trading), most successful trading approaches seems to rely on traders developing a theory ("edge"), making a large number of observations ("experience," "testing") which confirm that theory/edge, and thereby developing "probabilistic" expectations based on those observations that they can use to trade off of. Anything can happen -- but in each trade there exists an expectation based on experience/stats that a certain outcome (a profitable trade) is likely X% of the time.
From Wikidiff: "As nouns, the difference between prediction and expectation is that prediction is a statement of what will happen in the future while expectation is the act or state of expecting or looking forward to an event as about to happen."
Rather than applying the word "prediction" to trading approaches, I'd suggest that the word "expectation" is generally more appropriate, particularly in the mathematical, probabilistic sense. Even when rigorous math/statistics is not applied (as it might be say, in algorithmic trading), most successful trading approaches seems to rely on traders developing a theory ("edge"), making a large number of observations ("experience," "testing") which confirm that theory/edge, and thereby developing "probabilistic" expectations based on those observations that they can use to trade off of. Anything can happen -- but in each trade there exists an expectation based on experience/stats that a certain outcome (a profitable trade) is likely X% of the time.
From Wikidiff: "As nouns, the difference between prediction and expectation is that prediction is a statement of what will happen in the future while expectation is the act or state of expecting or looking forward to an event as about to happen."