Our Traders’ Academy Python TWS API course features a chapter on retrieving data, which will be of great interest to data scientists focusing on finance and econometrics. Follow these quick steps to get started.
First, sign up for our free course via this link: www.ibkr.com/academy. This online class in Python programming features IBKR flagship Trader Workstation and demonstrates how to trade via the Application Programming Interface (TWS API).
Be sure to watch the short videos and get up-to-speed with the application and Python code.
Data scientists will find practical information and ready-to-use Python syntax in Lesson #5: Receiving Market Data and Historical Candlesticks.
Next, focus on the Lesson 5 video and read the Study Notes. In this chapter, the instructor demonstrates important functions to retrieve the market data:
reqMktData: retrieves data several times per second.reqRealTimeBars: retrieves OHLC bars for each 5 second periodreqHistoricalData: helps with retrieving bars
reqTickByTickData: delivers streaming tick-by-tick data for every trade or quote change
Here is an example of requesting streaming market data. For additional functions, see the Study Notes.
def main():
app = TestApp()
app.connect(“127.0.0.1”, 7497, 0)
contract = Contract()
contract.symbol = “AAPL”
contract.secType = “STK”
contract.exchange = “SMART”
contract.currency = “USD”
contract.primaryExchange = “NASDAQ”
app.reqMarketDataType(4) # switch to delayed-frozen data if live is not available
app.reqMktData(1, contract, “”, False, False, [])
app.run()
The instructor wraps up the lesson with a helpful tip on storing the returned data in Pandas dataframes. For ready-to-use Python syntax, see https://pandas.pydata.org/
Finally, for those interested in how to process and analyse the data via Pandas frames, the article Visualizing Time Series Data of Stock Prices with Python will showcase which libraries and functions are practical and easy to use.
Disclosure: Interactive Brokers
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