The exact tools the framework is built and run on.

The price and volatility data feed the framework runs on — SPY, QQQ, TQQQ, VIX, HYG, TLT.

Why I use it — Clean adjusted weekly closes via a simple API, at a hobbyist-friendly price. The whole signal is reproducible from this one source.

Where the Roth IRA lives and where the single position is held and rebalanced.

Why I use it — Lists TQQQ, no per-trade commission on ETFs, and a Roth IRA that's quick to open. The weekly cadence means fees barely matter — but zero is still better.

For eyeballing the 44-week SMA, the slope, and the SPY extension when I want to sanity-check a signal by hand.

Why I use it — The weekly SMA and a VIX overlay reproduce the pillars visually in about a minute. Free tier is plenty; I don't use its alerts to trade — the rules do that.