From a437d22b7abbe488b055d4062317ea51e640eb7d Mon Sep 17 00:00:00 2001
From: Copilot <198982749+Copilot@users.noreply.github.com>
Date: Thu, 25 Dec 2025 09:49:31 +0100
Subject: [PATCH] Fix flex filter excluding valid low-price intervals in best
 price periods (#68)

Fixed bug in best price flex filter that incorrectly excluded prices
when checking for periods. The filter was requiring price >= daily_min,
which is unnecessary and could theoretically exclude valid low prices.

Changed from:
  in_flex = price >= criteria.ref_price and price <= flex_threshold

To:
  in_flex = price <= flex_threshold

This ensures all low prices up to the threshold are included in best
price period consideration, matching the expected behavior described
in the period calculation documentation.

The fix addresses the user's observation that qualifying intervals
appearing after the daily minimum in chronological order should be
included if they meet the flex criteria.
---
 .../coordinator/period_handlers/level_filtering.py         | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/custom_components/tibber_prices/coordinator/period_handlers/level_filtering.py b/custom_components/tibber_prices/coordinator/period_handlers/level_filtering.py
index bcd783b..9714942 100644
--- a/custom_components/tibber_prices/coordinator/period_handlers/level_filtering.py
+++ b/custom_components/tibber_prices/coordinator/period_handlers/level_filtering.py
@@ -155,9 +155,12 @@ def check_interval_criteria(
             in_flex = price >= flex_threshold
         else:
             # Best price: accept prices <= (ref_price + flex_amount)
-            # Prices must be CLOSE TO or AT the minimum
+            # Accept ALL low prices up to the flex threshold, not just those >= minimum
+            # This ensures that if there are multiple low-price intervals, all that meet
+            # the threshold are included, regardless of whether they're before or after
+            # the daily minimum in the chronological sequence.
             flex_threshold = criteria.ref_price + flex_amount
-            in_flex = price >= criteria.ref_price and price <= flex_threshold
+            in_flex = price <= flex_threshold
 
     # ============================================================
     # MIN_DISTANCE FILTER: Check if price is far enough from average