Plan Limits
Your plan sets a few caps on backtesting. The two most important ones decide whether a scenario will run at all, so size your window against them before you launch — otherwise the run is rejected (and a long run can waste real time getting there).
Two backtest limits, and they are independent
There are two separate time limits. They are easy to confuse, so keep them distinct:
- Historical data (recency) — how far back a backtest can reach. This is the earliest start date your plan can use.
- Max backtest length — how long a single run can span (end date minus start date), regardless of where it starts.
These two limits are independent. On Backtester you can start a run up to 5 years ago (recency), but any single run can cover at most 1 year (max length). To test a 5-year history you'd run several backtests, each ≤ 1 year — not one 5-year run.
| Plan | Historical data (how far back) | Max backtest length (per run) |
|---|---|---|
| Sandbox | last 6 months | 180 days |
| Backtester | last 5 years | 1 year |
| Analyst | unlimited | 5 years |
The error you'll see if a run is too long
If a scenario's window is longer than your plan's max backtest length, the run is rejected with:
Time range exceeds plan limit (180 days). Upgrade for longer backtests.
The number reflects your plan (180 days on Sandbox). Shorten the window or upgrade — see Pricing for the upgrade path.
Other per-plan caps
| Limit | Sandbox | Backtester | Analyst |
|---|---|---|---|
| Backtests per month | 15 | 500 | Unlimited |
| Concurrent backtests | 1 | 3 | 10 |
| Kept strategy versions | 5 | 50 | Unlimited |
| Saved configurations | 3 | 10 | Unlimited |
| Multi-instrument backtesting | — | — | Yes |
| Multi-scenario Tektii Boards | — | — | Yes |
"Kept strategy versions" counts versions you've pinned with Keep; creating versions is free and unlimited, and each version's image is stored free for 30 days from upload.
Sizing a scenario up front
- Pick your instruments and confirm the data actually exists for the dates you want — see Available Instruments for each symbol's
dataStartDate→dataEndDaterange. - Check that your start date is within your plan's historical data reach and your window is within the max backtest length above.
- Author the scenario — see
tektii scenario createin the commands reference.