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The line, before anything else

TWMD is a data and verification layer. There is no order path, no broker credential is ever held, no position is visible, and nothing here can place, amend, cancel or size a trade. Any page with this title that implies otherwise is describing a product with a far larger surface — and the difference matters most to the people for whom it matters at all.

What is actually hard, and is ours

Placing an order is a solved problem your broker already documents. Making sure the signal was computed on data that was knowable at the time is not, and it is where quiet losses come from: a backtest that reads the future does not fail, it produces a better curve than the truth and you deploy it.

Signal to order, with the boundary in the code

import requests

def prices_as_of(symbol: str, as_of: str, limit: int = 250):
    r = requests.get(
        "https://api.twmarketdata.com/v2/datasets/twse-daily-price",
        params={"symbol": symbol, "limit": limit, "as_of": as_of},
        timeout=30,
    )
    r.raise_for_status()
    body = r.json()
    ctx = body["request_context"]
    # Refuse to proceed if the filter did not apply. A silent present-value response is the one
    # bug in a backtest that never announces itself.
    assert ctx["point_in_time"], f"as_of was not applied: {ctx}"
    return body["rows"]

decision = strategy(prices_as_of("2330", today))

# Everything past this line is your broker's SDK, your risk limits and your responsibility.
# TWMD has no order path, holds no broker credentials, and cannot place, amend, cancel or
# size a trade.
broker.place(decision)

The assert is the load-bearing line. If the parameter is ever renamed or ignored you receive present values and the loop keeps running — so the check belongs in your code, not in your trust of ours. The request above needs no API key; you can run it before you have an account.

What is left behind afterwards

Every value the decision used resolves to a signed snapshot that a third party can verify with a keyless endpoint and a script that imports nothing of ours. That is not a claim about whether the trade was a good idea — it is the record of what the strategy could see, which is the question that gets asked afterwards and the one that is normally unanswerable.

• Run the request now, no signup
• For institutions: auditable AI decisions
• Checks you can run yourself

Not investment advice.