To gather and manipulate aggregated forex data using APIs in C++, you can follow these steps:

1. Choose a reliable forex API provider that offers aggregated data. Some popular options include OANDA, Xignite, and Alpha Vantage.

2. Sign up for an account with the chosen API provider and obtain an API key. This key will be used to authenticate your requests.

3. Use a library like cURL or an HTTP client library in C++ (such as Boost.Asio or CPPRESTSDK) to perform HTTP requests to the API endpoints.

4. Construct the API request URL with the necessary parameters. These parameters may include the currency pairs, time range, and data frequency.

5. Make the HTTP request to the API endpoint using the API key for authentication.

6. Receive the response from the API, which will contain the aggregated forex data.

7. Parse the response data and extract the relevant information, such as the currency pairs, exchange rates, and timestamps.

8. Perform any necessary data manipulation or calculations using the extracted data.

9. Optionally, store the aggregated forex data in a data structure or write it to a file for further analysis or use in your algorithmic trading system.

Here's an example C++ code snippet that shows the basic structure for gathering and manipulating aggregated forex data using an API:

1#include <iostream>
2#include <vector>
3
4int main() {
5  // Code for gathering and manipulating aggregated forex data
6
7  return 0;
8}

Remember to replace the placeholder comments with the actual logic for making the API requests, parsing the response, and performing the necessary data manipulation.

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#include <iostream>

#include <vector>

​

int main() {

  // Code for gathering and manipulating aggregated forex data

​

  return 0;

}