1. A computer-implemented method for allowing a user to express a forecasting estimate, comprising the computer-implemented steps of: receiving at least a first user input, via a user interface; in response to the at least a first user input, providing a display, via the user interface, which depicts a probability density curve, where the probability density curve is plotted versus a range of different possible outcomes of an event on an x-axis and a range of likelihoods of occurrence of the different possible outcomes on a y-axis, the probability density curve has at least one peak, an area under the probability density curve equals one, and the display also depicts a score which is associated with one of the different possible outcomes which is aligned with the at least one peak of the probability density curve; and receiving at least a second user input, via the user interface, for manipulating the probability density curve on the display; and in response to the manipulating the probability density curve on the display, updating the score on the display.