Statistics#

tradeexecutor.state.statistics.Statistics class.

class Statistics[source]#

Statistics for a trade execution state.

We calculate various statistics on the server-side and make them part of the state, so that JS clients can easily display this information.

Statistics are collected over time and more often than trading ticks. We store historical statistics for each position as the part of the state.

__init__(portfolio=<factory>, positions=<factory>, closed_positions=<factory>)#

Parameters

Return type

None

Methods

`__init__`([portfolio, positions, ...])
`add_positions_stats`(position_id, p_stats)	Add a new sample to position stats.
`from_dict`(kvs, *[, infer_missing])
`from_json`(s, *[, parse_float, parse_int, ...])
`get_latest_portfolio_stats`()
`get_latest_position_stats`(position_id)
`get_portfolio_statistics_dataframe`(attr_name)	Get any of position statistcs value as a columnar data.
`schema`(*[, infer_missing, only, exclude, ...])
`to_dict`([encode_json])
`to_json`(*[, skipkeys, ensure_ascii, ...])

Attributes

`portfolio`	Per portfolio statistics.
`positions`	Per position statistics.
`closed_positions`	Per position statistics for closed positions.

portfolio: List[PortfolioStatistics]#: Per portfolio statistics. Contains list of statistics for the portfolio over time. The first timestamp is the first entry in the list. Note that now we have only one portfolio per state.

positions: Dict[int, List[PositionStatistics]]#: Per position statistics. We look them up by position id. Each position contains list of statistics for the position over time. The first timestamp is the first entry in the list.

closed_positions: Dict[int, FinalPositionStatistics]#: Per position statistics for closed positions.

add_positions_stats(position_id, p_stats)[source]#

Add a new sample to position stats.

We cannot use defaultdict() here because we lose defaultdict instance on state serialization.

Parameters

get_portfolio_statistics_dataframe(attr_name, resampling_time='D', resampling_method='max')[source]#

Get any of position statistcs value as a columnar data.

Example:

# Create time series of portfolio "total_equity" over its lifetime
s = stats.get_portfolio_statistics_dataframe("total_equity")

Parameters

attr_name (str) – Which variable we are interested in. E.g. total_equity.
resampling_time (str) – See http://pandas.pydata.org/pandas-docs/stable/user_guide/timeseries.html#resampling
resamping_method – See http://pandas.pydata.org/pandas-docs/stable/user_guide/timeseries.html#resampling
resampling_method (str) –

Returns

DataFrame for the value with time as index.

Return type

Series

__init__(portfolio=<factory>, positions=<factory>, closed_positions=<factory>)#

Parameters

Return type

None