outcometick

The Python strategy SDK for outcometick.com — tick-level data for Polymarket and Predict.fun crypto Up/Down markets.

pip install outcometick

from outcometick import Strategy, Order


class MeanReversion(Strategy):
    def on_market_open(self, ctx, market):
        self.entered = False

    def on_tick(self, ctx, tick):
        z = ctx.zscore(tick.value, window=180)
        if self.entered or abs(z) < ctx.p.entry_z:
            return None
        side = "DOWN" if z > 0 else "UP"
        limit = ctx.book().best(side)
        if limit is None:
            return None
        self.entered = True
        return Order(side=side, size=ctx.p.size, limit=limit)

What is in here

The SDK surface your strategy imports, and nothing else:

It is typed (py.typed), so your editor and mypy know the API. Everything a strategy can actually do arrives through ctx, which the runner constructs — there is deliberately nothing here to reach out with.

The hooks are not defined on the base class on purpose. A default no-op on_tick would turn "you declared a hook you did not implement" — a rejection fixable in seconds — into a run that quietly never trades and bills you for an empty equity curve.

Testing

pip install . && python -m unittest discover -s tests

Downloading data

The other half of the package, on a separate import because it has nothing to do with writing a strategy:

from outcometick.data import DataClient, NO_VALUE

ot = DataClient()                                  # key from OT_KEY

meta = ot.meta()                                   # what can this key see?

res = ot.files(
    from_="2026-08-01", to="2026-08-12",           # or date="2026-08-12"
    asset=["BTCUSD", "ETHUSD"],                    # a list means "any of these"
    dataset="prices",
    interval=["5m", NO_VALUE],                     # "5m" alone EXCLUDES the
)                                                  # period-less settlement streams

ot.download(res["files"][0], save_to="btc.csv.gz")  # checksum verified

from_ rather than from, because from is a Python keyword; it goes on the wire as from.

meta()["intervals"] holds real durations only — the none sentinel is reported separately under filterTokens, so code that builds an enum from it or parses the values as durations never meets a token.

Standard library only: no requests, no dependency added to your project.

Running a backtest

Submitting and replaying is done with the ot command line, which is distributed on npm because there is exactly one of it for both languages:

npm i -g outcometick
ot check .          # the same validator the queue runs
ot run   .          # replay locally against sample data
ot submit .         # send it to the queue

It runs Python strategies by spawning your local python3. Two CLIs would mean two copies of the validator, and the second copy is what makes "if it passes locally it will not be rejected on submit" stop being true.

Full reference: https://outcometick.com/docs/sdk