The Bollinger Bands indicator drawn using a tick chart.

After launching it, wait for enough ticks to come.

Parameters:

• Period - period of averaging.
• Deviation - deviation from the main line.
• Price levels count - number of displayed price levels (no levels are displayed if set to 0).
• Bar under calculation - number of bars on the chart for the indicator calculation.

Buffer indexes: 0 - base_LINE, 1 - UPPER_BAND, 2 - LOWER_BAND, 3 - BID, 4 - ASK.