English to Portuguese Other Business/Commerce (general)

But to this rule, again, there are exceptions, and useful conclusions can seldom be drawn from the volume manifestations of a few days, much less a single trading session; it is only the overall and relative volume trend over a period of time that may produce helpful indications. Moreover, in Dow Theory, conclusive signals as to the market's trend are produced in the final analysis only by price movement. Volume simply affords collateral evidence which may aid interpretation of otherwise doubtful situations. (We shall have much more to say in later chapters about volume in specific relation to other technical phenomena.)