The script calculates candle statistics (the minimal, maximal and average values of candles body and shadows) of the current chart.

The calculated statistics is shown for 3 groups (bullish, bearish and all) of candles in the upper left corner of the chart.

The calculation interval depends on 5 first input parameters (the interval also can be selected with two vertical lines with names, defined in input parameters).

How does it work:

• If there isn't any vertical lines (with names, defined by "start line" and "name finish line" inputs) and "bars for calculation"=0 - the start and finish dates are defined by values, specified in "date start" and "date finish" input parameters.
• If chart contains the vertical lines with names, defined by "start line" and "name finish line" inputs  and bars for calculation=0 - the start and finish dates are defined by values, depending on time properties of these vertical lines.
• If bars for calculation > 0, it calculates the specified number of bars -1 (the current uncompleted bar is not used in calculations).

*If chart contains only one line ("name start line" or "name finish line"), or start time> finish time or bars for calculation< 0 - the script does nothing and finish its work.

Other input parameters:

• Digits, 4 or 5 (used in normalization and string formatting);
• Colors of groups;
• Font size;
• Delete text labels from the chart (if true, the script only deletes the labels and does calculate nothing).

The code has comments.