diff --git a/src/blockchain/wallet.js b/src/blockchain/wallet.js
index 0b6e02f..b5abd31 100644
--- a/src/blockchain/wallet.js
+++ b/src/blockchain/wallet.js
@@ -56,6 +56,7 @@ export const useWalletStore = defineStore('wallet', ()=>{
 export function onChainChanged(chainId) {
   console.log('onChainChanged', chainId)
   chainId = Number(chainId)
+  socket.emit('chain', chainId)
   const store = useStore()
   const ws = useWalletStore()
   if( chainId !== ws.chainId ) {
diff --git a/src/common.js b/src/common.js
index 188e6c0..b2f4aca 100644
--- a/src/common.js
+++ b/src/common.js
@@ -1,3 +1,5 @@
+export const NATIVE_TOKEN = '0x0000000000000000000000000000000000000001'
+
 export function mixin(child, ...parents) {
     // child is modified directly, assigning fields from parents that are missing in child.  parents fields are
     // assigned by parents order, highest priority first
diff --git a/src/components/chart/DCABuilder.vue b/src/components/chart/DCABuilder.vue
index cfaab30..f785f51 100644
--- a/src/components/chart/DCABuilder.vue
+++ b/src/components/chart/DCABuilder.vue
@@ -59,6 +59,7 @@ import Color from "color";
 import OrderAmount from "@/components/chart/OrderAmount.vue";
 import {MAX_FRACTION, newTranche} from "@/blockchain/orderlib.js";
 import {getFeeSchedule} from "@/fees.js";
+import {NATIVE_TOKEN} from "@/common.js";
 
 const s = useStore()
 const co = useChartOrderStore()
@@ -126,7 +127,12 @@ const partsGasHint = computed(()=>{
     schedFetcher.invoke(s.vault)
     return null
   }
-  return toPrecision(Number(sched.value.gasFee) * parts.value / 1e18) + ' ETH gas fee'
+  const ethFee = Number(sched.value.gasFee) * parts.value / 1e18;
+  const mark = s.markPrice(NATIVE_TOKEN)
+  if (mark)
+    return '$' + Number(ethFee*mark).toFixed(2) + ' gas fee'
+  else
+    return toPrecision(ethFee) + ' ETH gas fee'
 })
 
 const intervalIsTotal = ref(false)
diff --git a/src/socket.js b/src/socket.js
index 85eb043..23352d7 100644
--- a/src/socket.js
+++ b/src/socket.js
@@ -73,6 +73,11 @@ socket.on('vaults', (chainId, owner, vaults)=>{
     }
 })
 
+socket.on('mark.usd', (chainId, token, value)=>{
+    const s = useStore()
+    s.markPrices[`${chainId}|${token}`] = Number(value)
+    // console.log('mark.usd', token, value)
+})
 
 function handleOrderStatus(chainId, vault, orderIndex, status) {
     const s = useStore()
diff --git a/src/store/store.js b/src/store/store.js
index fb0c99e..6b292f7 100644
--- a/src/store/store.js
+++ b/src/store/store.js
@@ -107,6 +107,8 @@ export const useStore = defineStore('app', ()=> {
   const balances = computed( () => vault.value === null ? {} : vaultBalances.value[vault.value] || {} )
   const vaultOrders = computed(()=> vault.value === null || (!vault.value in orders.value) ? {} : orders.value[vault.value] ? orders.value[vault.value] : [] )
   const tokens = computed(getTokens)
+  const markPrices = ref({})  // key: `${chainId}|${tokenAddr}` value: USD value
+  function markPrice(token) { return markPrices.value[`${chainId.value}|${token}`] }
   const factory = computed(() => !chain.value ? null : chain.value.factory)
   const helper = computed(() => {console.log('chain helper', chain.value); return !chain.value ? null : chain.value.helper})
   const mockenv = computed(() => !chain.value ? null : chain.value.mockenv)
@@ -147,6 +149,7 @@ export const useStore = defineStore('app', ()=> {
     removeTransactionSender, error, closeError, addToken, clock, balances,
     approved, regionApproved, walletApproved,
     getBalance, creatingVault,
+    markPrices, markPrice,
   }
 })