Decyphering a Histogram

no mid-tones everything is white or black

This is the Histogram I got from your image when I opened it in Lightroom. It shows gray values - in the higher values, so probably sky or clouds and lower values, probably trees in the foreground but lacking in the middle area, probably because of the high contrast - - - but also reflects the chopping off of the curve at both ends as a result of blown out highlights in the mountains and shadows showing no detail. This is your processed image though - are you referring to the histogram on your camera - was it totally different than what you get in Photoshop? I however am not a Histogram wiz so am only basing this on my limited knowledge (and interest) of the subject.