Announcing: BTS Strength/Weakness Zones

Brian Ernest Metzger on June 21, 2026

Backtested Strategies announces BTS Strength/Weakness Zones, proprietary All Data research overlays in BTS Heatmaps that highlight selected historical multi-week periods of unusual relative strength or weakness versus the S&P 500.

Backtested Strategies has launched BTS Strength/Weakness Zones as a research layer for its interactive market seasonality heatmaps. The overlays help users flag selected historical periods of relative strength or weakness across eligible symbols in the BTS Heatmaps family.

BTS Heatmaps provide weekly views across major market benchmarks, U.S. sectors, industry ETFs, country ETFs and selected stock universes, with a daily view for Major Indexes. BTS Strength/Weakness Zones are available in All Data views for eligible symbols. The tools can be accessed from the BTS Heatmaps page.

BTS Strength/Weakness Zones examples

The examples below show the two BTS Strength/Weakness Zones display modes in BTS Heatmaps: BTS Strength Zones for selected relative-strength periods and BTS Weakness Zones for selected relative-weakness periods.

BTS Strength Zones

BTS Strength Zones heatmap for major indexes, with highlighted cells marking selected periods of unusually strong relative strength versus the S&P 500.
Figure 1. BTS Strength Zones example: highlighted cells mark selected All Data periods of unusual relative strength versus the S&P 500.

BTS Weakness Zones

BTS Weakness Zones heatmap for major indexes, with highlighted cells marking selected periods of unusually weak relative performance versus the S&P 500.
Figure 2. BTS Weakness Zones example: highlighted cells mark selected All Data periods of unusual relative weakness versus the S&P 500.

What BTS Strength/Weakness Zones show

BTS Strength/Weakness Zones mark All Data periods where a market group showed unusually strong or weak relative performance versus the S&P 500. The heatmap interface separates the overlay into BTS Strength Zones for selected relative-strength periods and BTS Weakness Zones for selected relative-weakness periods.

When a selected cell falls inside a BTS Zone, the heatmap details pane shows the average relative move versus the S&P 500 and the number of weeks in the zone. Users can review the highlighted periods alongside the heatmap’s eight metrics: Average Return, Median Return, Volatility, Return / Volatility, Positive Week Rate / Positive Day Rate, Win Rate vs S&P 500, Relative Return vs S&P 500 and Sample Size.

Built for research, not prediction

BTS Strength/Weakness Zones are built for historical market research, not prediction. They can help users compare recurring seasonal behavior and relative-performance clusters, but the overlays are historical summaries, not forecasts, trading signals or trading recommendations.

BTS Strength/Weakness Zones are available with Pro and UltraPro plans. Compare plans.

About Backtested Strategies

Backtested Strategies (BTS) is a financial research publisher operated by Marquantex LLC, focused on systematic trading strategies, rigorous backtests and market tools for serious investors. BTS publishes backtests under a standardized, institutional-grade methodology that makes strategy rules, assumptions, benchmarks, trading-cost treatment, portfolio accounting and reporting conventions explicit. Its research is designed to help investors judge strategy behavior, risk, implementation demands and portfolio fit with the full structure of each test in view.