I've been following an asset wherein a "R-squared predictive forecast (close, 14)" is posted online each day. On some days, this figure is extremely high, like .92. Exactly what is the significance of the "14?" Does it refer to the past 14 days? The next 14 days? Something else? How do I interpret the R-squared predictive forecast? For example, does it mean that 92% of the variance in the next day's closing price can be explained by the current day's change between closing and opening values? Or