Modification to indicator

Alterations for a indicator: filter.mq4 (attached)

I need about this indicator:

1- Modifation to histogram to bar (see figure-1);

2- Hide all external inputs;

The archive .ex4 (not .mq4) of this indicator, will be used externally in the future as an part of an EA (robot),

as filter (Green authorizes only buy orders, Red authorizes only sell orders).

1- So, If necessary reserve one extra buffer for future EA read data from this indicator,

   maybe using  iCustom() function.

2- Also, If necessary, Describe how to read data from this indicator using iCustom() function.