Should sell now indicator

index.html

@@ -280,6 +280,11 @@ <h2 class="dialog-box__name" data-i18n="general.daisy-mae"></h2>
           <tbody id="output"></tbody>
         </table>
       </div>
+
+      <div class="form__row">
+        <h6 data-i18n="output.better.title"></h6>
+          <label id="betterLabel"></label>
+      </div>
     </div>
 
     <div style="transform:rotate(180deg)">

js/scripts.js

@@ -290,12 +290,13 @@ const displayPercentage = function(fraction) {
 
 const hideChart = function() {
   $("#output").html("");
-  $(".chart-wrapper").hide()
+  $(".chart-wrapper").hide();
+  $("#betterLabel").html("");
 }
 
 const calculateOutput = function (data, first_buy, previous_pattern) {
   if (isEmpty(data)) {
-    hideChart()
+    hideChart();
     return;
   }
   let pat_desc = {0:"fluctuating", 1:"large-spike", 2:"decreasing", 3:"small-spike", 4:"all"};
@@ -340,6 +341,57 @@ const calculateOutput = function (data, first_buy, previous_pattern) {
   $("#output").html(output_possibilities);
 
   update_chart(data, analyzed_possibilities);
+
+  update_sellnow(data, analyzed_possibilities);
+
+};
+
+const update_sellnow = function(prices, patterns) {
+
+  // get today info
+  let now = new Date();
+  let now_index = now.getDay() * 2 + (now.getHours() >= 12 ? 1 : 0); // this is today's index
+
+  let label = '';
+
+  if (patterns.length == 1) {
+    // invalid data
+    label = "---"
+  } else if (now_index <= 1) {
+    // sunday
+    label = i18next.t("output.better.cant")
+  } else if (isNaN(prices[now_index])) {
+    // no today's price
+    label = i18next.t("output.better.no-data")
+  } else {
+    // calculate
+
+    let now_price = prices[now_index]; // this is the base price
+    var prob = 1 - patterns // probability of better is 1 minus probability of worst
+      .slice(1) // discard the combined pattern (first in the list)
+      .map(pattern => { // calculate probability of each pattern
+        return pattern.probability * pattern.prices // as the probability of this pattern times probability of all worst values
+          .slice(now_index + 1) // starting from tomorrow
+          .map(day => { // calculate probability of each day
+            if (day.min >= now_price) return 0; // if the minimum possible is already greater than now, we will always have a greater value
+            else if (day.max < now_price) return 1; // if the maximum possible is already lower than now, we will always have a lower value
+            else return (now_price - day.min) / (day.max - day.min + 1); // otherwise, the probability is the percentage of the low interval
+          }).reduce((acc, e) => acc * e, 1); // the probability of a pattern is the multiplications of each day
+      }).reduce((acc, e) => acc + e, 0); // the total probability is the addition of each pattern (already normalized)
+
+    // generate label
+    let probNumber = prob == 0 ? "0%" : displayPercentage(prob);
+    let probLabel = i18next.t(
+      prob >= 0.9 ? "output.better.no" :
+      prob >= 0.5 ? "output.better.prob-no" :
+      prob >= 0.1 ? "output.better.prob-yes" :
+      "output.better.yes"
+    );
+    label = `${probLabel} - ${i18next.t("output.better.details")} ${probNumber}`
+  }
+
+  // update
+  $("#betterLabel").html(label);
 };
 
 const generatePermalink = function (buy_price, sell_prices, first_buy, previous_pattern) {

locales/en.json

@@ -66,6 +66,16 @@
       "input": "Input Price",
       "minimum": "Guaranteed Minimum",
       "maximum": "Potential Maximum"
+    },
+    "better": {
+      "title": "Should I sell now?",
+      "cant": "Can't sell now",
+      "no-data": "Need today's price",
+      "yes": "Yes",
+      "prob-yes": "Probably yes",
+      "no": "No",
+      "prob-no": "Probably no",
+      "details": "Probability of better price is"
     }
   },
   "textbox": {