diff --git a/docs/implementation.md b/docs/implementation.md
index 48bd379..25bf5de 100644
--- a/docs/implementation.md
+++ b/docs/implementation.md
@@ -1069,3 +1069,8 @@ so nine elapsed minutes occupy nine logical slots and the line remains straight.
 Gaps over 30 minutes stay compressed, preserving the established treatment of the
 65-minute settlement break and weekends. A browser regression pins both the
 nine-slot spacing and equal historical/future screen slope.
+
+Production then showed that whitespace-only points could still disappear from the
+shared scale. The time-scale owner now uses transparent zero-valued points with an
+`autoscaleInfoProvider` that returns null. They remain invisible and cannot affect
+price range, but Lightweight Charts retains their timestamps as real series data.
diff --git a/static/chart.js b/static/chart.js
index 3f91356..eb9a6cb 100644
--- a/static/chart.js
+++ b/static/chart.js
@@ -233,6 +233,7 @@ class ConfluenceChart {
     // something to label and so timeToCoordinate answers out there.
     this.futureSpace = this.chart.addSeries(LightweightCharts.LineSeries, {
       priceScaleId: 'right',
+      color: 'rgba(0,0,0,0)',
       lastValueVisible: false,
       priceLineVisible: false,
       crosshairMarkerVisible: false,
@@ -531,7 +532,7 @@ class ConfluenceChart {
     if (step <= 0) return [];
     const slots = [];
     for (let index = 1; index <= ConfluenceChart.FUTURE_SLOTS; index += 1) {
-      slots.push({ time: last.t + index * step });
+      slots.push({ time: last.t + index * step, value: 0 });
     }
     return slots;
   }
@@ -544,7 +545,7 @@ class ConfluenceChart {
       const gap = bars[index].t - bars[index - 1].t;
       if (gap <= step || gap > ConfluenceChart.MAX_INTRADAY_GAP_SECONDS) continue;
       for (let time = bars[index - 1].t + step; time < bars[index].t; time += step) {
-        slots.push({ time });
+        slots.push({ time, value: 0 });
       }
     }
     return [...slots, ...this.futureTimes(bars)];
@@ -585,7 +586,7 @@ class ConfluenceChart {
       return;
     }
     const futureTime = bar.t + ConfluenceChart.FUTURE_SLOTS * step;
-    this.futureSpace.update({ time: futureTime });
+    this.futureSpace.update({ time: futureTime, value: 0 });
     for (const level of this.levels) {
       if (level.kind !== 'manual' || level.hidden || ConfluenceChart.isFlat(level)
           || futureTime < level.anchor_t || futureTime > (level.cutoff_t ?? Infinity)) continue;
diff --git a/tests/e2e/trendline.test.mjs b/tests/e2e/trendline.test.mjs
index 1fe7d69..fdc75a6 100644
--- a/tests/e2e/trendline.test.mjs
+++ b/tests/e2e/trendline.test.mjs
@@ -201,11 +201,15 @@ test('a short final data gap does not kink a future trendline',
           historicalSlope: (current.y - previous.y) / (current.x - previous.x),
           futureSlope: (future.y - current.y) / (future.x - current.x),
           historicalSlots: (current.x - previous.x) / (future.x - current.x),
+          missingSlotOwned: c.futureSpace.data()
+            .some(point => Number(point.time) === previousTime + minute),
         };
       });
 
       assert.ok(Math.abs(result.historicalSlots - 9) < 0.01,
         `a nine-minute data gap occupied ${result.historicalSlots} slots`);
+      assert.equal(result.missingSlotOwned, true,
+        'the invisible scale series discarded the missing intraday timestamp');
       assert.ok(Math.abs(result.historicalSlope - result.futureSlope) < 1e-9,
         `line kinked from ${result.historicalSlope} to ${result.futureSlope}`);
       assertNoPageErrors(page, assert);