TradingView adds custom second intervals from 1 to 299 seconds: who gets them and what it means for backtests

TradingView announced on 10 November 2026 that Ultimate plan subscribers can now set custom chart intervals anywhere from 1 to 299 seconds, such as 7 or 90 seconds. The standard second-based intervals (1, 5, 10, 15, 30 and 45 seconds) remain available from the Plus plan. TradingView's post, custom second intervals on Supercharts, says Pine indicators and strategies work on the new intervals.

Who gets what

• Custom intervals, 1 to 299 seconds: Ultimate plan only.
• Standard 1, 5, 10, 15, 30 and 45-second intervals: Plus plan and higher.

TradingView's post doesn't mention the Strategy Tester by name, so check how your own strategy behaves on a custom interval before relying on its results.

What it means for backtests

Second-level charts are useful for seeing how a fast entry behaves, but they make backtest results more sensitive to things a backtest can't see:

• Fills. On a 7-second bar, the difference between the signal price and the price you'd actually get is a much bigger share of each trade. Our guide to slippage in algo trading covers how much to assume.
• Costs. Short holding times mean small average wins, so commission and spread can take most of the edge.
• History. Second-level data covers less history than minute data, so a backtest may include only a few market conditions. See how many trades a backtest needs.
• Bar magnifier and intrabar fills. TradingView changed how its Strategy Tester models intrabar fills in October; see our post on the bar magnifier being replaced.

A strategy that only works on one unusual interval, such as 7 seconds but not 5 or 10, is more likely to be fitting noise. Check that nearby intervals give similar results.

Testing a fast idea before going live

If the idea also makes sense on 1-minute candles, test it there first with realistic costs and an unseen period. Strategy Lab backtests on 1-minute to daily candles with commission, spread and slippage, holds back the last 30% of the data and runs Monte Carlo, so you can see whether the edge survives costs before you chase it on second charts.