Vertical histograms constructor – library MetaTrader 5

Fig. 1. Vertical histogram of Bid and Ask prices distribution.
A histogram is a bar chart of frequencies. One of the axes represents variable values, while another — the frequency of these values’ occurrence. The height of each bar shows the frequency (number) of values ​​belonging to the respective interval equal to the column width. Such diagrams are usually displayed horizontally, i.e. variable values are