As far as I know, OEC Trader’s Chart histogram section cannot be relocated to a new position. There are several settings related to the histogram that can be configured, but I do not see a way to manipulate it’s location. Charts on OEC do have volume that can be displayed which orients itself to the bottom of the chart, but it looks like you already have volume enabled.
If you’d like to adjust the settings of your histogram, this can be done by left clicking the Configure button along the top of your chart’s toolbar and then scrolling down to the Histogram section as shown below:
I’ll continue to look into this to see if their is a solution to your question, but as far as I know this cannot be done.
Thanks for your question,
Optimus Futures Support