Overview

IBX - OCaml implementation of the Interactive Brokers TWS API


IBX is a pure OCaml implementation of the Interactive Brokers Trader Workstation API (TWS API) built on top of Jane Street's Core and Async library.

DISCLAIMER: This software is not approved by Interactive Brokers or any of its affiliates. It comes with absolutely no warranty and the use of this software for actual trading is at your own risk.

Installation

From OPAM

$ opam install ibx

From Source

$ make
$ make install

Usage

Documentation

The still incomplete API-documentation of this distribution can be built with make doc. It can also be found online.

Prerequisites

Before you start, please install the Interactive Brokers Trader Workstation TWS or its low-resource alternative IB Gateway and make sure that the software allows for incoming API connections. How this is done for TWS can be watched here. For more detailed information please refer to the Interactive Brokers API Reference Guide.

NOTE: You can use the username edemo with password demouser to log into the demo account.

Examples

This simple program will connect to the IB Gateway running on localhost and retrieve the closing price for a given stock symbol:

open Core.Std
open Async.Std
open Ibx.Std

let host = "localhost"
let port = 4001

let () =
  Command.async
    ~summary:"Show the closing price of the given stock symbol"
    Command.Spec.(
      empty
      +> flag "-currency" ~doc:" currency of the stock price"
        (optional_with_default `USD (Arg_type.create Currency.of_string))
      +> anon ("STOCK-SYMBOL" %: Arg_type.create Symbol.of_string)
    )
    (fun currency symbol () ->
      Tws.with_client ~host ~port ~on_handler_error:(`Call (fun e ->
        eprintf "[Error] Failed to retrieve closing price for %s: %s\n%!"
          (Symbol.to_string symbol) (Error.to_string_hum e);
      ))
      (fun tws ->
        Tws.latest_close_exn tws ~contract:(Contract.stock symbol ~currency)
        >>= fun close ->
        printf "[Info] Closing price for %s is %4.2f %s\n"
          (Symbol.to_string symbol) (Close.price close |> Price.to_float)
          (Currency.to_string currency);
        return ()
      )
    )
  |> Command.run

Assuming the above program is stored in the file show_close.ml, you can simply build it by running

$ ocamlbuild -use-ocamlfind -tag thread -pkg ibx show_close.native

and then use it to get the closing price of a stock (e.g. Apple Inc.) as follows:

$ ./show_close.native AAPL

For more complex examples please refer to the examples-directory of this distribution. You can build the examples by typing

$ ./configure --enable-examples
$ make

in the top-level directory of this distribution. If the compilation of the examples was successful, you can type, for instance,

$ ./plot_history.native -sma 100 SPY

in order to plot a candle stick chart of the SPDR S&P 500 ETF with a simple 100-day moving average:

SPY SMA

The next command accumulates 30 seconds of trade and quote (TAQ) data of Google Inc.

$ ./plot_taq_data.native GOOG

and generates a plot which should look similar to this image:

GOOG TAQ

However, please note that these TAQ data plots do not reflect the true market history, since Interactive Brokers accumulates market data in time increments of 300 milliseconds; see here for more information.

Contact Information

In case of bugs, feature requests and similar, please contact: