DRAW_HISTOGRAM

 
I want to ask how to use "DRAW_HISTOGRAM". Should I prepare more than one indicator buffers if set the indicator stype to be "DRAW_HISTOGRAM"?

I tried to prepare 4 indicator buffers. I set "DRAW_HISTOGRAM" style for first 2 buffers and set "DRAW_LINE" for next 2 buffers. But once I filled data into next 2 buffers. The histogram graphic drawn by first 2 buffers will be distroyed.