It is recommended to first try to create the QBAlgo in TWS to see the most current available field values.
QBAlgos are only available in live accounts.
Some fields have default values and are optional in TWS but must be explicitly specified in the API.

Available QBAlgos

Strobe

Parameter	Description	Type	Syntax/Values
StartTime	Start Time	Time	hh:mm:ss tmz
EndTime	Must be on the same date as Start Time. Takes precedence over Duration.	Time	hh:mm:ss tmz
Duration	Alternative order end time specifier. This value is a number of minutes that the order should be worked. A value of -99 will specify that the end time should be the exchange close time.	Double
Benchmark	Benchmark	String	TWAP, VWAP
PercentVolume	Volume %	Double	>=0 and <=1
NoCleanup	No Cleanup	Boolean	"0" (false) or "1" (true)

Bolt

Parameter	Description	Type	Syntax/Values
StartTime	Start Time	Time	hh:mm:ss tmz
EndTime	Must be on the same date as Start Time. Takes precedence over Duration.	Time	hh:mm:ss tmz
Duration	Alternative order end time specifier. This value is a number of minutes that the order should be worked. A value of -99 will specify that the end time should be the exchange close time.	Double
Mode	Mode	String	Passive, Normal, Aggressive
PercentVolume	Volume %	Double	>=0 and <=1
EventPause	Event Pause	String	Attempt_To_Complete, Pause_Trading, Trade_Through
NoCleanup	No Cleanup	Boolean	"0" (false) or "1" (true
LiquidityAggressThreshold	Liquidity Aggressiveness Threshold	Double	>=0 and <=1

Closer

No Parameters

Octane

Parameter	Description	Type	Syntax/Values
StartTime	Start Time	Time	hh:mm:ss tmz
EndTime	Must be on the same date as Start Time. Takes precedence over Duration.	Time	hh:mm:ss tmz
Duration	Alternative order end time specifier. This value is a number of minutes that the order should be worked. A value of -99 will specify that the end time should be the exchange close time.	Double
Urgency	Urgency	String	High, Ultra_High

Example Quantitative Brokers Strobe Algo

...
...
Contract contract = new Contract();

contract.symbol("ES");

contract.secType("FUT");

contract.exchange("QBALGO");

contract.currency("USD");

contract.lastTradeDateOrContractMonth("202003");

...
AvailableAlgoParams.FillQBAlgoInlineParams(baseOrder, "10:00:00 US/Eastern", "16:00:00 US/Eastern", -99, "TWAP", 0.25, true );

client.placeOrder(nextOrderId++, ContractSamples.QBAlgoContract(), baseOrder);

...
public static void FillQBAlgoInlineParams(Order baseOrder, String startTime, String endTime, double duration, String benchmark,

double percentVolume, boolean noCleanUp) {

baseOrder.algoStrategy("STROBE");

baseOrder.algoParams(new ArrayList<>());

baseOrder.algoParams().add(new TagValue("StartTime", startTime));

baseOrder.algoParams().add(new TagValue("EndTime", endTime));

//This example uses endTime instead of duration

//baseOrder.algoParams().add(new TagValue("Duration", String.valueOf(duration)));

baseOrder.algoParams().add(new TagValue("Benchmark", benchmark));

baseOrder.algoParams().add(new TagValue("PercentVolume", String.valueOf(percentVolume)));

baseOrder.algoParams().add(new TagValue("NoCleanUp", noCleanUp ? "1" : "0"));

}
...
...
...
...
1 contract = Contract()

2 contract.symbol = "ES"

3 contract.secType = "FUT"

4 contract.exchange = "QBALGO"

5 contract.currency = "USD"

6 contract.lastTradeDateOrContractMonth = "202003"

...
1 AvailableAlgoParams.FillQBAlgoInLineParams(baseOrder, "10:00:00 US/Eastern", "16:00:00 US/Eastern", -99, "TWAP", 0.25, True)

2 self.placeOrder(self.nextOrderId(), ContractSamples.QBAlgoContract(), baseOrder)

...
1 @staticmethod

2 def FillQBAlgoInLineParams(baseOrder: Order, startTime: str,

3 endTime: str, duration: float,

4 benchmark: str, percentVolume: float,

5 noCleanUp: bool):

6 # must be direct-routed to "QBALGO"

7 baseOrder.algoStrategy = "STROBE"

8 baseOrder.algoParams = []

9 baseOrder.algoParams.append(TagValue("StartTime", startTime))

10 baseOrder.algoParams.append(TagValue("EndTime", endTime))

11 #This example uses endTime instead of duration

12 #baseOrder.algoParams.append(TagValue("Duration", str(duration)))

13 baseOrder.algoParams.append(TagValue("Benchmark", benchmark))

14 baseOrder.algoParams.append(TagValue("PercentVolume", str(percentVolume)))

15 baseOrder.algoParams.append(TagValue("NoCleanUp", int(noCleanUp)))