Balance of Power (BOP)

Created by Igor Levshin, the Balance of Power (aka Balance of Market Power) is a momentum oscillator that depicts the strength of buying and selling pressure. [Discuss] 💬

// C# usage syntax
IReadOnlyList<BopResult> results =
  bars.ToBop(smoothPeriods);

Parameters

param	type	description
smoothPeriods	int	Number of periods (N) for smoothing. Must be greater than 0. Default is 14.

Historical price bars requirements

You must have at least N periods of bars to cover the warmup periods.

bars is a collection of generic TBar historical price bars. It should have a consistent frequency (day, hour, minute, etc). See the Guide for more information.

Response

IReadOnlyList<BopResult>

• This method returns a time series of all available indicator values for the bars provided.
• It always returns the same number of elements as there are in the historical price bars.
• It does not return a single incremental indicator value.
• The first N-1 periods will have null values since there's not enough data to calculate.

BopResult

property	type	description
Timestamp	DateTime	Date from evaluated TBar
Bop	double	Balance of Power

Utilities

• .Condense()
• .Find(lookupDate)
• .RemoveWarmupPeriods()
• .RemoveWarmupPeriods(removePeriods)

See Utilities and helpers for more information.

Chaining

Results can be further processed on Bop with additional chain-enabled indicators.

// example
var results = bars
    .ToBop(..)
    .ToSlope(..);

This indicator must be generated from bars and cannot be generated from results of another chain-enabled indicator or method.

See Chaining indicators for more.

Streaming

Use the buffer-style List<T> when you need incremental calculations without a hub:

BopList bopList = new(smoothPeriods);

foreach (IBar bar in bars)  // simulating stream
{
  bopList.Add(bar);
}

// based on `ICollection<BopResult>`
IReadOnlyList<BopResult> results = bopList;

Subscribe to a BarHub for advanced streaming scenarios:

BarHub barHub = new();
BopHub observer = barHub.ToBopHub(smoothPeriods);

foreach (IBar bar in bars)  // simulating stream
{
  barHub.Add(bar);
}

IReadOnlyList<BopResult> results = observer.Results;

See Buffer lists and Stream hubs for full usage guides.