I realized that the MGGT Wind Trend page wasn´t working correctly. Found the problem and fixed it.
Note that the MGGT Wind Trend and the MGGT Density Altitude sites are not static. The graphs of both sites are generated on-the-fly after pulling data from the Aviation Weather Center. The pages will always show the latest up to date historic data points. This information is not always perfectly formatted. A format that didn´t “make any sense to the program” was the reason for the graph not generating correctly. Again, is fixed now and hope will serve you well.