Supported Indicators
Sortino Ratio
Introduction
Calculation of the Sortino Ratio, a modification of the
To view the implementation of this indicator, see the LEAN GitHub repository.
Using SORTINO Indicator
To create an automatic indicators for SortinoRatio, call the SORTINO helper method from the QCAlgorithm class. The SORTINO method creates a SortinoRatio object, hooks it up for automatic updates, and returns it so you can used it in your algorithm. In most cases, you should call the helper method in the Initializeinitialize method.
public class SortinoRatioAlgorithm : QCAlgorithm
{
private Symbol _symbol;
private SortinoRatio _sortino;
public override void Initialize()
{
_symbol = AddEquity("SPY", Resolution.Daily).Symbol;
_sortino = SORTINO(_symbol, 22);
}
public override void OnData(Slice data)
{
if (_sortino.IsReady)
{
// The current value of _sortino is represented by itself (_sortino)
// or _sortino.Current.Value
Plot("SortinoRatio", "sortino", _sortino);
}
}
} class SortinoRatioAlgorithm(QCAlgorithm):
def initialize(self) -> None:
self._symbol = self.add_equity("SPY", Resolution.DAILY).symbol
self.sortino = self.SORTINO(self.symbol, 22)
def on_data(self, slice: Slice) -> None:
if self.sortino.is_ready:
# The current value of self.sortino is represented by self.sortino.current.value
self.plot("SortinoRatio", "sortino", self.sortino.current.value)
The following reference table describes the SORTINO method:
sortino(symbol, sortino_period, minimum_acceptable_return=0.0, resolution=None, selector=None)[source]Creates a new Sortino indicator.
- symbol (Symbol) — The symbol whose Sortino we want
- sortino_period (int) — Period of historical observation for Sortino ratio calculation
- minimum_acceptable_return (float, optional) — Minimum acceptable return (eg risk-free rate) for the Sortino ratio calculation
- resolution (Resolution, optional) — The resolution
- selector (Callable[IBaseData, float], optional) — x.Value)
The SortinoRatio indicator for the requested symbol over the specified period
SORTINO(symbol, sortinoPeriod, minimumAcceptableReturn=0.0, resolution=None, selector=None)[source]Creates a new Sortino indicator.
- symbol (Symbol) — The symbol whose Sortino we want
- sortinoPeriod (Int32) — Period of historical observation for Sortino ratio calculation
- minimumAcceptableReturn (Double, optional) — Minimum acceptable return (eg risk-free rate) for the Sortino ratio calculation
- resolution (Resolution, optional) — The resolution
- selector (Func<IBaseData, Decimal>, optional) — x.Value)
The SortinoRatio indicator for the requested symbol over the specified period
If you don't provide a resolution, it defaults to the security resolution. If you provide a resolution, it must be greater than or equal to the resolution of the security. For instance, if you subscribe to hourly data for a security, you should update its indicator with data that spans 1 hour or longer.
For more information about the selector argument, see Alternative Price Fields.
For more information about plotting indicators, see Plotting Indicators.
You can manually create a SortinoRatio indicator, so it doesn't automatically update. Manual indicators let you update their values with any data you choose.
Updating your indicator manually enables you to control when the indicator is updated and what data you use to update it. To manually update the indicator, call the Updateupdate method with time/number pair or an IndicatorDataPoint. The indicator will only be ready after you prime it with enough data.
public class SortinoRatioAlgorithm : QCAlgorithm
{
private Symbol _symbol;
private SortinoRatio _sortino;
public override void Initialize()
{
_symbol = AddEquity("SPY", Resolution.Daily).Symbol;
_sortino = new SortinoRatio(22);
}
public override void OnData(Slice data)
{
if (data.Bars.TryGetValue(_symbol, out var bar))
{
_sortino.Update(bar.EndTime, bar.Close);
}
if (_sortino.IsReady)
{
// The current value of _sortino is represented by itself (_sortino)
// or _sortino.Current.Value
Plot("SortinoRatio", "sortino", _sortino);
}
}
} class SortinoRatioAlgorithm(QCAlgorithm):
def initialize(self) -> None:
self._symbol = self.add_equity("SPY", Resolution.DAILY).symbol
self.sortino = SortinoRatio(22)
def on_data(self, slice: Slice) -> None:
bar = slice.bars.get(self._symbol)
if bar:
self.sortino.update(bar.EndTime, bar.Close)
if self.sortino.is_ready:
# The current value of self.sortino is represented by self.sortino.current.value
self.plot("SortinoRatio", "sortino", self.sortino.current.value)
To register a manual indicator for automatic updates with the security data, call the RegisterIndicatorregister_indicator method.
public class SortinoRatioAlgorithm : QCAlgorithm
{
private Symbol _symbol;
private SortinoRatio _sortino;
public override void Initialize()
{
_symbol = AddEquity("SPY", Resolution.Daily).Symbol;
_sortino = new SortinoRatio(22);
RegisterIndicator(_symbol, _sortino, Resolution.Daily);
}
public override void OnData(Slice data)
{
if (_sortino.IsReady)
{
// The current value of _sortino is represented by itself (_sortino)
// or _sortino.Current.Value
Plot("SortinoRatio", "sortino", _sortino);
}
}
} class SortinoRatioAlgorithm(QCAlgorithm):
def initialize(self) -> None:
self._symbol = self.add_equity("SPY", Resolution.DAILY).symbol
self.sortino = SortinoRatio(22)
self.register_indicator(self._symbol, self.sortino, Resolution.DAILY)
def on_data(self, slice: Slice) -> None:
if self.sortino.is_ready:
# The current value of self.sortino is represented by self.sortino.current.value
self.plot("SortinoRatio", "sortino", self.sortino.current.value)
The following reference table describes the SortinoRatio constructor:
SortinoRatio
Calculation of the Sortino Ratio, a modification of the SharpeRatio. Reference: https://www.cmegroup.com/education/files/rr-sortino-a-sharper-ratio.pdf Formula: S(x) = (R - T) / TDD Where: S(x) - Sortino ratio of x R - the average period return T - the target or required rate of return for the investment strategy under consideration. In Sortino’s early work, T was originally known as the minimum acceptable return, or MAR. In his more recent work, MAR is now referred to as the Desired Target Return. TDD - the target downside deviation. TargetDownsideDeviation
get_enumerator()Returns an enumerator that iterates through the history window.
IEnumerator[IndicatorDataPoint]
reset()Resets this indicator to its initial state
to_detailed_string()Provides a more detailed string of this indicator in the form of {Name} - {Value}
str
update(time, value)Updates the state of this indicator with the given value and returns true if this indicator is ready, false otherwise
- time (datetime)
- value (float)
bool
update(input)Updates the state of this indicator with the given value and returns true if this indicator is ready, false otherwise
- input (IBaseData)
bool
consolidatorsThe data consolidators associated with this indicator if any
The data consolidators associated with this indicator if any
ISet[IDataConsolidator]
currentGets the current state of this indicator. If the state has not been updated then the time on the value will equal DateTime.MinValue.
Gets the current state of this indicator. If the state has not been updated then the time on the value will equal DateTime.MinValue.
IndicatorDataPoint
is_readyReturns whether the indicator is properly initialized with data
Returns whether the indicator is properly initialized with data
bool
itemIndexes the history windows, where index 0 is the most recent indicator value. If index is greater or equal than the current count, it returns null. If the index is greater or equal than the window size, it returns null and resizes the windows to i + 1.
Indexes the history windows, where index 0 is the most recent indicator value. If index is greater or equal than the current count, it returns null. If the index is greater or equal than the window size, it returns null and resizes the windows to i + 1.
IndicatorDataPoint
nameGets a name for this indicator
Gets a name for this indicator
str
previousGets the previous state of this indicator. If the state has not been updated then the time on the value will equal DateTime.MinValue.
Gets the previous state of this indicator. If the state has not been updated then the time on the value will equal DateTime.MinValue.
IndicatorDataPoint
samplesGets the number of samples processed by this indicator
Gets the number of samples processed by this indicator
int
warm_up_periodRequired period, in data points, for the indicator to be ready and fully initialized.
Required period, in data points, for the indicator to be ready and fully initialized.
int
windowA rolling window keeping a history of the indicator values of a given period
A rolling window keeping a history of the indicator values of a given period
RollingWindow[IndicatorDataPoint]
SortinoRatio
Calculation of the Sortino Ratio, a modification of the SharpeRatio. Reference: https://www.cmegroup.com/education/files/rr-sortino-a-sharper-ratio.pdf Formula: S(x) = (R - T) / TDD Where: S(x) - Sortino ratio of x R - the average period return T - the target or required rate of return for the investment strategy under consideration. In Sortino’s early work, T was originally known as the minimum acceptable return, or MAR. In his more recent work, MAR is now referred to as the Desired Target Return. TDD - the target downside deviation. TargetDownsideDeviation
GetEnumerator()Returns an enumerator that iterates through the history window.
IEnumerator[IndicatorDataPoint]
Reset()Resets this indicator to its initial state
ToDetailedString()Provides a more detailed string of this indicator in the form of {Name} - {Value}
String
Update(time, value)Updates the state of this indicator with the given value and returns true if this indicator is ready, false otherwise
- time (DateTime)
- value (decimal)
Boolean
Update(input)Updates the state of this indicator with the given value and returns true if this indicator is ready, false otherwise
- input (IBaseData)
Boolean
ConsolidatorsThe data consolidators associated with this indicator if any
The data consolidators associated with this indicator if any
ISet<IDataConsolidator>
CurrentGets the current state of this indicator. If the state has not been updated then the time on the value will equal DateTime.MinValue.
Gets the current state of this indicator. If the state has not been updated then the time on the value will equal DateTime.MinValue.
IndicatorDataPoint
IsReadyReturns whether the indicator is properly initialized with data
Returns whether the indicator is properly initialized with data
bool
NameGets a name for this indicator
Gets a name for this indicator
string
PreviousGets the previous state of this indicator. If the state has not been updated then the time on the value will equal DateTime.MinValue.
Gets the previous state of this indicator. If the state has not been updated then the time on the value will equal DateTime.MinValue.
IndicatorDataPoint
SamplesGets the number of samples processed by this indicator
Gets the number of samples processed by this indicator
int
WarmUpPeriodRequired period, in data points, for the indicator to be ready and fully initialized.
Required period, in data points, for the indicator to be ready and fully initialized.
Int32
WindowA rolling window keeping a history of the indicator values of a given period
A rolling window keeping a history of the indicator values of a given period
RollingWindow<IndicatorDataPoint>
[System.Int32]Indexes the history windows, where index 0 is the most recent indicator value. If index is greater or equal than the current count, it returns null. If the index is greater or equal than the window size, it returns null and resizes the windows to i + 1.
Indexes the history windows, where index 0 is the most recent indicator value. If index is greater or equal than the current count, it returns null. If the index is greater or equal than the window size, it returns null and resizes the windows to i + 1.
IndicatorDataPoint
Visualization
The following image shows plot values of selected properties of SortinoRatio using the plotly library.
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