Streamster API
The pages referenced below describe how to use the Streamster API to create applications that interface with the Streamster trading platform. Applications using the Streamster API can retrieve various data from the platform, execute and modify orders and positions, and perform a variety of related actions.
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2.6. GetBars
GetBars method retrieves an array of bars for a specified instrument and period. Each bar in the returned array of bars contains price at a specific point in time.
NOTE: Only bars from any open Charting windows in Streamster can be retrieved. If you wish to retrieve bars from your script for a specific instrument and period, you have to make sure that this instrument/period is shown in one of Streamster's Charting windows.
The GetBars method has three parameters: instrument, period and a flag for options.
First parameter of the GetBars method is a string that specifies the instrument for which bars will be retrieved. The second parameter, Period, specifies the required period such as "5 Minutes", "15 Minutes", "30 Minutes", "Hourly", "4 Hours", "Daily", "Weekly", or "Monthly". The third parameter is a string that determines the order in which bars are returned: a blank string if bars are to be returned in descending order or a string "f" (as in "flip") for ascending order.
Each bar in the returned array of bars has the following fields: BarDateTime, Open, High, Low, Close and Volume.
Sample - PHP: The following code retrieves 5-minute EUR/USD bars and shows them all.
<?php
$api = new SoapClient ("http://127.0.0.1:8018/service.wsdl",
array('features' => SOAP_SINGLE_ELEMENT_ARRAYS));
$r = $api -> GetBars("EUR/USD", "5 minutes", "f");
if(property_exists($r, "Bar")) {
foreach($r -> Bar as $n => $Bar) {
echo $Bar -> BarDateTime . " " . $Bar -> Open . " " . $Bar -> High .
" " . $Bar -> Low . " " . $Bar -> Close . "\n";
}
}
?>
Sample - Visual Basic: The following code retrieves 5-minute EUR/USD bars and shows them all.
Dim api As StreamsterApi = New StreamsterApi
Dim ab As Bar()
Dim b As Bar
ab = api.GetBars("EUR/USD", "5 minutes", "")
For Each b In ab
Console.WriteLine(b.BarDateTime & " " & b.Open & " " & b.High &
" " & b.Low & " " & b.Close)
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