diff --git a/common/calculate-swap3.ts b/common/calculate-swap3.ts
index fc552e2b..5819ae8e 100644
--- a/common/calculate-swap3.ts
+++ b/common/calculate-swap3.ts
@@ -91,5 +91,5 @@ function toProb(tick: number) {
 
 export function fromProb(prob: number) {
   const ratio = prob / (1 - prob)
-  return Math.log(ratio) / Math.log(1.0001)
+  return Math.floor(Math.log(ratio) / Math.log(1.0001))
 }
diff --git a/web/pages/swap.tsx b/web/pages/swap.tsx
index 9a22b11d..f5bbe7de 100644
--- a/web/pages/swap.tsx
+++ b/web/pages/swap.tsx
@@ -86,16 +86,12 @@ function PoolTable(props: { pool: Swap3Pool }) {
   )
 }
 
-// Stored as optimization. equal to floor(log_sqrt_1.0001(sqrtRatio))
-function tick(sqrtRatio: number) {
-  return Math.floor(Math.log(sqrtRatio) / Math.log(1.0001))
-}
-
 export default function Swap() {
   const [pool, setPool] = useState({
     liquidity: 100,
     sqrtRatio: 2,
-    tick: tick(0.1),
+    tick: fromProb(0.3),
+    ticks: [],
   })
 
   const [minTick, setMinTick] = useState(0)