diff --git a/dabo/functions/webpage.sh b/dabo/functions/webpage.sh
index 306977c..0f7d376 100644
--- a/dabo/functions/webpage.sh
+++ b/dabo/functions/webpage.sh
@@ -223,13 +223,17 @@ function webpage {
         local tradeintervals=$(cat ${interimfile} | wc -l)
         head -n1 asset-histories/${asset}.history.csv >${g_tmp}/trade.csv
         grep -A ${tradeintervals} "${tradedatebuy}:" asset-histories/${asset}.history.csv >>${g_tmp}/trade.csv
-        echo "Price, EMA, Levels" >>../index.html.tmp
-        genchart "${g_tmp}/trade.csv" ${tradeintervals} 2,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39 >>../index.html.tmp
-        echo "MACD" >>../index.html.tmp
-        genchart "${g_tmp}/trade.csv" ${tradeintervals} 8,6,7 >>../index.html.tmp
-        echo "RSIs" >>../index.html.tmp
-        genchart "${g_tmp}/trade.csv" ${tradeintervals} 10,11,12,14,15,16,17,13 >>../index.html.tmp
-
+        # cache old trade charts
+        if ! [ -s "${interimfile}.chart" ]
+        then
+          echo "Price, EMA, Levels" >${interimfile}.chart
+          genchart "${g_tmp}/trade.csv" ${tradeintervals} 2,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39 >>${interimfile}.chart
+          echo "MACD" >>${interimfile}.chart
+          genchart "${g_tmp}/trade.csv" ${tradeintervals} 8,6,7 >>${interimfile}.chart
+          echo "RSIs" >>${interimfile}.chart
+          genchart "${g_tmp}/trade.csv" ${tradeintervals} 10,11,12,14,15,16,17,13 >>${interimfile}.chart
+        fi
+        cat "${interimfile}.chart" >>../index.html.tmp
         echo "</details></td></tr>" >>../index.html.tmp
       else
         echo "</tr>" >>../index.html.tmp