Ghost peeking out of the currents is actually a street light reflection
 

Full picture
 

This close-up leaves no doubt about the
light pole producing the window image
 

Ghostly reflections usually have a logical explanation
Obviously, a good paranormal investigator will always look for any and all logical explanations for an anomaly within a photo first. That's particularly true when it comes to windows. The above photo is similar to a "soft ghost" photo accept for the fact that we have proven this one to be a false positive. It has a logical explanation. A "soft ghost" photo however, would leave enough doubt for consideration. We know from experience that ghosts do have an ability to appear within a window pane, especially on film. In some instances they seem to use such a substance to display themselves more clearly. However, when dealing with windows we have to consider trees, clouds, sky colors, and everything else within the range of a window when considering a ghost image within. Clouds & tree-branches are usually the problem. Indoors it's usually furnishings or live people! We here at Ghoststudy reject most window photos because they're simply not conclusive enough for consideration. But.... don't get us wrong, we truly appreciate a good window ghost capture, so keep them coming!  : )