C predictive information the system provides

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c . Predictive information : The system provides analytical models that show the expectancy value of the stock or bonds in future days or years. It shows linear regression and other type of graphs that shows the future prediction of a certain stock. d. Instructional information : It guides the user with the process of buying/selling stocks through the site. User can read manuals, watch videos or ask on the live chat on how the process works. e. Command information : When buying or selling a stock, the system will show a box where user has to agree to the terms accorded with the buyer/seller and retype the password in order to sell/buy stocks. This action has to be done in that precise moment, otherwise transaction will be canceled after 5 minutes.
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In this market’s system, auditory displays are better than visual displays because of the variability of this market. Stock can rise or fall in short periods of time, so in order to sell or buy stocks at a desired price, auditory displays are taken into account so instant action is required. Pros of Auditory Display in current system : Instant action gets more value to the customer, user does not need to wait to perform an action. This waiting time could reduce the value of a stock. Cons of Auditory Display in current System : user could make mistakes and have no way to return to previous actions since action was performed already.
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