diff --git a/web/components/charts/contract/binary.tsx b/web/components/charts/contract/binary.tsx
index b7dc9e18..ab3c7ab9 100644
--- a/web/components/charts/contract/binary.tsx
+++ b/web/components/charts/contract/binary.tsx
@@ -31,9 +31,9 @@ const getBetPoints = (bets: Bet[]) => {
 }
 
 const BinaryChartTooltip = (props: TooltipProps<Date, HistoryPoint<Bet>>) => {
-  const { data, mouseX, xScale } = props
+  const { data, x, xScale } = props
   const [start, end] = xScale.domain()
-  const d = xScale.invert(mouseX)
+  const d = xScale.invert(x)
   return (
     <Row className="items-center gap-2">
       {data.obj && <Avatar size="xs" avatarUrl={data.obj.userAvatarUrl} />}
diff --git a/web/components/charts/contract/choice.tsx b/web/components/charts/contract/choice.tsx
index 513e020e..a6e46a5d 100644
--- a/web/components/charts/contract/choice.tsx
+++ b/web/components/charts/contract/choice.tsx
@@ -180,9 +180,9 @@ export const ChoiceContractChart = (props: {
 
   const ChoiceTooltip = useMemo(
     () => (props: TooltipProps<Date, MultiPoint<Bet>>) => {
-      const { data, mouseX, xScale } = props
+      const { data, x, xScale } = props
       const [start, end] = xScale.domain()
-      const d = xScale.invert(mouseX)
+      const d = xScale.invert(x)
       const legendItems = sortBy(
         data.y.map((p, i) => ({
           color: CATEGORY_COLORS[i],
diff --git a/web/components/charts/contract/numeric.tsx b/web/components/charts/contract/numeric.tsx
index f634b56d..8c2e9388 100644
--- a/web/components/charts/contract/numeric.tsx
+++ b/web/components/charts/contract/numeric.tsx
@@ -26,11 +26,11 @@ const getNumericChartData = (contract: NumericContract) => {
 const NumericChartTooltip = (
   props: TooltipProps<number, DistributionPoint>
 ) => {
-  const { data, mouseX, xScale } = props
-  const x = xScale.invert(mouseX)
+  const { data, x, xScale } = props
+  const amount = xScale.invert(x)
   return (
     <>
-      <span className="text-semibold">{formatLargeNumber(x)}</span>
+      <span className="text-semibold">{formatLargeNumber(amount)}</span>
       <span className="text-greyscale-6">{formatPct(data.y, 2)}</span>
     </>
   )
diff --git a/web/components/charts/contract/pseudo-numeric.tsx b/web/components/charts/contract/pseudo-numeric.tsx
index f8a916bd..93e3d32f 100644
--- a/web/components/charts/contract/pseudo-numeric.tsx
+++ b/web/components/charts/contract/pseudo-numeric.tsx
@@ -45,9 +45,9 @@ const getBetPoints = (bets: Bet[], scaleP: (p: number) => number) => {
 const PseudoNumericChartTooltip = (
   props: TooltipProps<Date, HistoryPoint<Bet>>
 ) => {
-  const { data, mouseX, xScale } = props
+  const { data, x, xScale } = props
   const [start, end] = xScale.domain()
-  const d = xScale.invert(mouseX)
+  const d = xScale.invert(x)
   return (
     <Row className="items-center gap-2">
       {data.obj && <Avatar size="xs" avatarUrl={data.obj.userAvatarUrl} />}
diff --git a/web/components/charts/generic-charts.tsx b/web/components/charts/generic-charts.tsx
index 34a8a848..4d42da44 100644
--- a/web/components/charts/generic-charts.tsx
+++ b/web/components/charts/generic-charts.tsx
@@ -21,8 +21,8 @@ import {
   AreaPath,
   AreaWithTopStroke,
   Point,
-  MouseProps,
   SliceMarker,
+  TooltipParams,
   TooltipComponent,
   computeColorStops,
   formatPct,
@@ -89,7 +89,7 @@ export const DistributionChart = <P extends DistributionPoint>(props: {
 }) => {
   const { data, w, h, color, margin, yScale, curve, Tooltip } = props
 
-  const [mouse, setMouse] = useState<MouseProps<P>>()
+  const [ttParams, setTTParams] = useState<TooltipParams<P>>()
   const [viewXScale, setViewXScale] =
     useState<ScaleContinuousNumeric<number, number>>()
   const xScale = viewXScale ?? props.xScale
@@ -109,13 +109,13 @@ export const DistributionChart = <P extends DistributionPoint>(props: {
     const p = selector(mouseX)
     props.onMouseOver?.(p.prev)
     if (p.prev) {
-      setMouse({ x: mouseX, y: mouseY, data: p.prev })
+      setTTParams({ x: mouseX, y: mouseY, data: p.prev })
     } else {
-      setMouse(undefined)
+      setTTParams(undefined)
     }
   })
 
-  const onMouseLeave = useEvent(() => setMouse(undefined))
+  const onMouseLeave = useEvent(() => setTTParams(undefined))
 
   const onSelect = useEvent((ev: D3BrushEvent<P>) => {
     if (ev.selection) {
@@ -135,7 +135,7 @@ export const DistributionChart = <P extends DistributionPoint>(props: {
       margin={margin}
       xAxis={xAxis}
       yAxis={yAxis}
-      mouse={mouse}
+      ttParams={ttParams}
       onSelect={onSelect}
       onMouseOver={onMouseOver}
       onMouseLeave={onMouseLeave}
@@ -168,7 +168,7 @@ export const MultiValueHistoryChart = <P extends MultiPoint>(props: {
 }) => {
   const { data, w, h, colors, margin, yScale, yKind, curve, Tooltip } = props
 
-  const [mouse, setMouse] = useState<MouseProps<P>>()
+  const [ttParams, setTTParams] = useState<TooltipParams<P>>()
   const [viewXScale, setViewXScale] = useState<ScaleTime<number, number>>()
   const xScale = viewXScale ?? props.xScale
 
@@ -208,13 +208,13 @@ export const MultiValueHistoryChart = <P extends MultiPoint>(props: {
     const p = selector(mouseX)
     props.onMouseOver?.(p.prev)
     if (p.prev) {
-      setMouse({ x: mouseX, y: mouseY, data: p.prev })
+      setTTParams({ x: mouseX, y: mouseY, data: p.prev })
     } else {
-      setMouse(undefined)
+      setTTParams(undefined)
     }
   })
 
-  const onMouseLeave = useEvent(() => setMouse(undefined))
+  const onMouseLeave = useEvent(() => setTTParams(undefined))
 
   const onSelect = useEvent((ev: D3BrushEvent<P>) => {
     if (ev.selection) {
@@ -234,7 +234,7 @@ export const MultiValueHistoryChart = <P extends MultiPoint>(props: {
       margin={margin}
       xAxis={xAxis}
       yAxis={yAxis}
-      mouse={mouse}
+      ttParams={ttParams}
       onSelect={onSelect}
       onMouseOver={onMouseOver}
       onMouseLeave={onMouseLeave}
@@ -272,7 +272,7 @@ export const SingleValueHistoryChart = <P extends HistoryPoint>(props: {
   const { data, w, h, color, margin, yScale, yKind, Tooltip } = props
   const curve = props.curve ?? curveLinear
 
-  const [mouse, setMouse] = useState<MouseProps<P> & SliceExtent>()
+  const [mouse, setMouse] = useState<TooltipParams<P> & SliceExtent>()
   const [viewXScale, setViewXScale] = useState<ScaleTime<number, number>>()
   const xScale = viewXScale ?? props.xScale
 
@@ -299,7 +299,7 @@ export const SingleValueHistoryChart = <P extends HistoryPoint>(props: {
   }, [w, h, yKind, xScale, yScale])
 
   const selector = dataAtPointSelector(data, xScale)
-  const onMouseOver = useEvent((mouseX: number, mouseY: number) => {
+  const onMouseOver = useEvent((mouseX: number) => {
     const p = selector(mouseX)
     props.onMouseOver?.(p.prev)
     const x0 = p.prev ? xScale(p.prev.x) : xScale.range()[0]
@@ -310,7 +310,7 @@ export const SingleValueHistoryChart = <P extends HistoryPoint>(props: {
     if (p.prev && markerY) {
       setMouse({
         x: mouseX,
-        y: mouseY,
+        y: markerY,
         y0: py0,
         y1: markerY,
         data: p.prev,
@@ -347,7 +347,9 @@ export const SingleValueHistoryChart = <P extends HistoryPoint>(props: {
       margin={margin}
       xAxis={xAxis}
       yAxis={yAxis}
-      mouse={mouse}
+      ttParams={
+        mouse ? { x: mouse.x, y: mouse.y, data: mouse.data } : undefined
+      }
       onSelect={onSelect}
       onMouseOver={onMouseOver}
       onMouseLeave={onMouseLeave}
diff --git a/web/components/charts/helpers.tsx b/web/components/charts/helpers.tsx
index a4c6d026..bc225b5b 100644
--- a/web/components/charts/helpers.tsx
+++ b/web/components/charts/helpers.tsx
@@ -144,7 +144,7 @@ export const SVGChart = <X, TT>(props: {
   margin: Margin
   xAxis: Axis<X>
   yAxis: Axis<number>
-  mouse: MouseProps<TT> | undefined
+  ttParams: TooltipParams<TT> | undefined
   onSelect?: (ev: D3BrushEvent<any>) => void
   onMouseOver?: (mouseX: number, mouseY: number) => void
   onMouseLeave?: () => void
@@ -157,7 +157,7 @@ export const SVGChart = <X, TT>(props: {
     margin,
     xAxis,
     yAxis,
-    mouse,
+    ttParams,
     onSelect,
     onMouseOver,
     onMouseLeave,
@@ -213,13 +213,13 @@ export const SVGChart = <X, TT>(props: {
 
   return (
     <div className="relative overflow-hidden">
-      {mouse && Tooltip && (
+      {ttParams && Tooltip && (
         <TooltipContainer
           setElem={tooltipMeasure.setElem}
           margin={margin}
           pos={getTooltipPosition(
-            mouse.x,
-            mouse.y,
+            ttParams.x,
+            ttParams.y,
             innerW,
             innerH,
             tooltipMeasure.width,
@@ -228,9 +228,9 @@ export const SVGChart = <X, TT>(props: {
         >
           <Tooltip
             xScale={xAxis.scale()}
-            mouseX={mouse.x}
-            mouseY={mouse.y}
-            data={mouse.data}
+            x={ttParams.x}
+            y={ttParams.y}
+            data={ttParams.data}
           />
         </TooltipContainer>
       )}
@@ -287,11 +287,9 @@ export const getTooltipPosition = (
   return { left, bottom }
 }
 
-export type TooltipProps<X, T> = {
-  mouseX: number
-  mouseY: number
+export type TooltipParams<T> = { x: number; y: number; data: T }
+export type TooltipProps<X, T> = TooltipParams<T> & {
   xScale: ContinuousScale<X>
-  data: T
 }
 
 export type TooltipComponent<X, T> = React.ComponentType<TooltipProps<X, T>>
@@ -320,8 +318,6 @@ export const TooltipContainer = (props: {
   )
 }
 
-export type MouseProps<T> = { x: number; y: number; data: T }
-
 export const computeColorStops = <P,>(
   data: P[],
   pc: (p: P) => string,
diff --git a/web/components/charts/stats.tsx b/web/components/charts/stats.tsx
index eb3999d8..d43fcb98 100644
--- a/web/components/charts/stats.tsx
+++ b/web/components/charts/stats.tsx
@@ -22,8 +22,8 @@ const getPoints = (startDate: number, dailyValues: number[]) => {
 }
 
 const DailyCountTooltip = (props: TooltipProps<Date, HistoryPoint>) => {
-  const { data, mouseX, xScale } = props
-  const d = xScale.invert(mouseX)
+  const { data, x, xScale } = props
+  const d = xScale.invert(x)
   return (
     <Row className="items-center gap-2">
       <span className="font-semibold">{dayjs(d).format('MMM DD')}</span>
@@ -33,8 +33,8 @@ const DailyCountTooltip = (props: TooltipProps<Date, HistoryPoint>) => {
 }
 
 const DailyPercentTooltip = (props: TooltipProps<Date, HistoryPoint>) => {
-  const { data, mouseX, xScale } = props
-  const d = xScale.invert(mouseX)
+  const { data, x, xScale } = props
+  const d = xScale.invert(x)
   return (
     <Row className="items-center gap-2">
       <span className="font-semibold">{dayjs(d).format('MMM DD')}</span>
diff --git a/web/components/portfolio/portfolio-value-graph.tsx b/web/components/portfolio/portfolio-value-graph.tsx
index 62692ae5..35d63c6c 100644
--- a/web/components/portfolio/portfolio-value-graph.tsx
+++ b/web/components/portfolio/portfolio-value-graph.tsx
@@ -18,8 +18,8 @@ const MARGIN_Y = MARGIN.top + MARGIN.bottom
 export type GraphMode = 'profit' | 'value'
 
 export const PortfolioTooltip = (props: TooltipProps<Date, HistoryPoint>) => {
-  const { mouseX, xScale } = props
-  const d = dayjs(xScale.invert(mouseX))
+  const { x, xScale } = props
+  const d = dayjs(xScale.invert(x))
   return (
     <Col className="text-xs font-semibold sm:text-sm">
       <div>{d.format('MMM/D/YY')}</div>