diff --git a/src/components/chart/DCABuilder.vue b/src/components/chart/DCABuilder.vue
index a3e2a65..533dd18 100644
--- a/src/components/chart/DCABuilder.vue
+++ b/src/components/chart/DCABuilder.vue
@@ -39,7 +39,7 @@
 </template>
 
 <script setup>
-import {builderDefaults, MIN_EXECUTION_TIME, useChartOrderStore} from "@/orderbuild.js";
+import {builderDefaults, DEFAULT_SLIPPAGE, MIN_EXECUTION_TIME, useChartOrderStore} from "@/orderbuild.js";
 import {allocationText, VLine} from "@/charts/shape.js";
 import {sideColor} from "@/misc.js";
 import {useTheme} from "vuetify";
@@ -68,12 +68,12 @@ function computeDefaultColor() {
 
 const defaultColor = computeDefaultColor()
 
-// Fields must be defined in order to be reactive
 builderDefaults(props.builder, {
-  timeA: s.clock, // todo 0
+  timeA: s.clock, // todo relative 0
   timeB: null,
-  // relative: true,
-  relative: false, // todo
+  // relative: true, // todo
+  relative: false,
+  slippage: DEFAULT_SLIPPAGE,
   rungs: 1,
   skew: 0,
   color: defaultColor,
diff --git a/src/components/chart/MarketBuilder.vue b/src/components/chart/MarketBuilder.vue
index f3ab548..e4fb245 100644
--- a/src/components/chart/MarketBuilder.vue
+++ b/src/components/chart/MarketBuilder.vue
@@ -18,7 +18,7 @@
 </template>
 
 <script setup>
-import {builderDefaults, builderFuncs, useChartOrderStore} from "@/orderbuild.js";
+import {builderDefaults, builderFuncs, DEFAULT_SLIPPAGE, useChartOrderStore} from "@/orderbuild.js";
 import {computed, onMounted, onUnmounted} from "vue";
 import {newTranche} from "@/blockchain/orderlib.js";
 
@@ -27,7 +27,7 @@ const props = defineProps(['order', 'builder'])
 const emit = defineEmits(['update:builder'])
 
 // Fields must be defined in order to be reactive
-builderDefaults(props.builder, {valid: true, slippage: 0.0010,})
+builderDefaults(props.builder, {valid: true, slippage: DEFAULT_SLIPPAGE,})
 
 // slippage is expressed in % but the underlying builder value is an unadjusted ratio, so we convert by a factor of
 // 100 in and out
diff --git a/src/orderbuild.js b/src/orderbuild.js
index 3f6a6f2..edaea41 100644
--- a/src/orderbuild.js
+++ b/src/orderbuild.js
@@ -8,6 +8,7 @@ import Color from "color";
 
 
 export const MIN_EXECUTION_TIME = 60  // give at least one full minute for each tranche to trigger
+export const DEFAULT_SLIPPAGE = 0.0010;
 
 
 // Builders are data objects which store a configuration state
@@ -253,4 +254,4 @@ export function weightColors(weights, color) {
 
 export function deleteBuilder(order, builder) {
     order.builders = order.builders.filter((b) => b !== builder)
-}
\ No newline at end of file
+} // Fields must be defined in order to be reactive