diff --git a/src/components/visx/TimeSeriesChart.tsx b/src/components/visx/TimeSeriesChart.tsx
index fd8421032..e06d27fb0 100644
--- a/src/components/visx/TimeSeriesChart.tsx
+++ b/src/components/visx/TimeSeriesChart.tsx
@@ -161,7 +161,7 @@ export const TimeSeriesChart = <Datum extends {}>({
         return getClampedZoomDomain(defaultZoomDomain);
       }
       if (latestDatum != null && earliestDatum != null) {
-        return xAccessor(latestDatum) - xAccessor(earliestDatum);
+        return getClampedZoomDomain(xAccessor(latestDatum) - xAccessor(earliestDatum));
       }
       return minZoomDomain;
     })()
diff --git a/src/views/charts/FundingChart/index.tsx b/src/views/charts/FundingChart/index.tsx
index 64de28a1a..9900ceff8 100644
--- a/src/views/charts/FundingChart/index.tsx
+++ b/src/views/charts/FundingChart/index.tsx
@@ -10,6 +10,7 @@ import { FundingRateResolution, type FundingChartDatum } from '@/constants/chart
 import { STRING_KEYS } from '@/constants/localization';
 import { FundingDirection } from '@/constants/markets';
 import { SMALL_PERCENT_DECIMALS, TINY_PERCENT_DECIMALS } from '@/constants/numbers';
+import { timeUnits } from '@/constants/time';
 
 import { useBreakpoints } from '@/hooks/useBreakpoints';
 import { useStringGetter } from '@/hooks/useStringGetter';
@@ -26,7 +27,7 @@ import { MustBigNumber } from '@/lib/numbers';
 
 import { FundingChartTooltipContent } from './Tooltip';
 
-const FUNDING_RATE_TIME_RESOLUTION = 60 * 60 * 1000; // 1 hour
+const FUNDING_RATE_TIME_RESOLUTION = timeUnits.hour;
 
 const getAllFundingRates = (oneHourRate: number = 0) => ({
   [FundingRateResolution.OneHour]: oneHourRate,