diff --git a/lib/database.js b/lib/database.js
index 3af786a..5ccd6e8 100644
--- a/lib/database.js
+++ b/lib/database.js
@@ -205,6 +205,22 @@ function check_add_db_field(model_obj, field_name, default_value, cb) {
   });
 }
 
+function check_rename_db_field(model_obj, old_field_name, new_field_name, cb) {
+  // determine if a particular field exists in a db collection
+  model_obj.findOne({[old_field_name]: {$exists: false}}, function(err, model_data) {
+    // check if old field exists
+    if (model_data) {
+      // rename field
+      model_obj.updateMany({}, {
+        $rename: { [old_field_name]: new_field_name }
+      }, { multi: true, strict: false }, function() {
+        return cb(true);
+      });
+    } else
+      return cb(false);
+  });
+}
+
 function hex_to_ascii(hex) {
     var str = '';
     for (var i = 0; i < hex.length; i += 2)
@@ -935,11 +951,28 @@ module.exports = {
         lib.get_hashrate(function(hashrate) {
           // lookup network difficulty
           lib.get_difficulty(function(difficulty) {
+            var difficultyPOW = 0;
+            var difficultyPOS = 0;
+
+            if (difficulty && difficulty['proof-of-work']) {
+              if (settings.shared_pages.difficulty == 'Hybrid') {
+                difficultyPOS = difficulty['proof-of-stake'];
+                difficultyPOW = difficulty['proof-of-work'];
+              } else if (settings.shared_pages.difficulty == 'POW')
+                difficultyPOW = difficulty['proof-of-work'];
+              else
+                difficultyPOS = difficulty['proof-of-stake'];
+            } else if (settings.shared_pages.difficulty == 'POW')
+              difficultyPOW = difficulty;
+            else
+              difficultyPOS = difficulty;
+
             // create a new network history record
             var newNetworkHistory = new NetworkHistory({
               blockindex: height,
               nethash: (hashrate == null || hashrate == '-' ? 0 : hashrate),
-              difficulty: difficulty
+              difficulty_pow: difficultyPOW,
+              difficulty_pos: difficultyPOS,
             });
 
             // save the new network history record
@@ -1541,6 +1574,22 @@ module.exports = {
     });
   },
 
+  check_networkhistory: function(cb) {
+    NetworkHistory.findOne({}, function(err, networkhistory) {
+      if (networkhistory) {
+        // collection has data
+        // determine if the difficulty field exists
+        check_rename_db_field(NetworkHistory, 'difficulty', 'difficulty_pow', function(renamed) {
+          // determine if difficulty_pos field exists
+          check_add_db_field(NetworkHistory, 'difficulty_pos', 0, function(exists) {
+            return cb(true);
+          });
+        });
+      } else
+        return cb(false);
+    });
+  },
+
   initialize_data_startup: function(cb) {
     console.log('Initializing database.. Please wait...');
 
@@ -1562,23 +1611,26 @@ module.exports = {
           module.exports.check_txes(function(txes_exists) {
             // add new field(s) to masternode collection if missing
             module.exports.check_masternodes(function(masternodes_exists) {
-              // check if richlist collection is initialized
-              module.exports.check_richlist(settings.coin.name, function(richlist_exists) {
-                skip = true;
+              // add new field(s) and/or rename old field(s) in networkhistory collection if applicable
+              module.exports.check_networkhistory(function(networkhistory_exists) {
+                // check if richlist collection is initialized
+                module.exports.check_richlist(settings.coin.name, function(richlist_exists) {
+                  skip = true;
 
-                // determine if richlist collection already exists
-                if (richlist_exists == false) {
-                  console.log('No richlist entry found. Creating new entry now..');
-                  skip = false;
-                }
+                  // determine if richlist collection already exists
+                  if (richlist_exists == false) {
+                    console.log('No richlist entry found. Creating new entry now..');
+                    skip = false;
+                  }
 
-                // initialize the richlist collection
-                module.exports.create_richlist(settings.coin.name, skip, function() {
-                  // check and initialize the heavycoin collection
-                  init_heavy(function() {
-                    // finished initializing startup data
-                    console.log('Database initialization complete');
-                    return cb();
+                  // initialize the richlist collection
+                  module.exports.create_richlist(settings.coin.name, skip, function() {
+                    // check and initialize the heavycoin collection
+                    init_heavy(function() {
+                      // finished initializing startup data
+                      console.log('Database initialization complete');
+                      return cb();
+                    });
                   });
                 });
               });
diff --git a/lib/settings.js b/lib/settings.js
index 1f277a1..2e0b881 100644
--- a/lib/settings.js
+++ b/lib/settings.js
@@ -311,14 +311,22 @@ exports.shared_pages = {
         //          Set this to any valid html color
         //          Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
         "bgcolor": "#ffffff",
-        // line_color: Change the line color of the network difficulty chart
-        //             Set this to any valid html color
-        //             Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
-        "line_color": "rgba(255, 99, 132, 1)",
-        // fill_color: Change the fill color of the network difficulty chart
-        //             Set this to any valid html color
-        //             Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
-        "fill_color": "rgba(255, 99, 132, 0.2)",
+        // pow_line_color: Change the line color of the network difficulty chart for POW coins
+        //                 Set this to any valid html color
+        //                 Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
+        "pow_line_color": "rgba(255, 99, 132, 1)",
+        // pow_fill_color: Change the fill color of the network difficulty chart for POW coins
+        //                 Set this to any valid html color
+        //                 Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
+        "pow_fill_color": "rgba(255, 99, 132, 0.2)",
+        // pos_line_color: Change the line color of the network difficulty chart for POS coins
+        //                 Set this to any valid html color
+        //                 Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
+        "pos_line_color": "rgba(255, 161, 0, 1)",
+        // pos_fill_color: Change the fill color of the network difficulty chart for POS coins
+        //                 Set this to any valid html color
+        //                 Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
+        "pos_fill_color": "rgba(255, 161, 0, 0.2)",
         // crosshair_color: Change the vertical crosshair line color of the network difficulty chart
         //                  Set this to any valid html color
         //                  Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
@@ -1727,6 +1735,8 @@ exports.loadSettings = function loadSettings() {
       // delete old setting
       delete json_settings.shared_pages.favicon;
     }
+    json_settings = fix_deprecated_setting(json_settings, 'shared_pages.page_header.network_charts.difficulty_chart.line_color', 'shared_pages.page_header.network_charts.difficulty_chart.pow_line_color');
+    json_settings = fix_deprecated_setting(json_settings, 'shared_pages.page_header.network_charts.difficulty_chart.fill_color', 'shared_pages.page_header.network_charts.difficulty_chart.pow_fill_color');
 
     // loop through all settings from the settings.json file
     for (var current_setting in json_settings) {
diff --git a/models/networkhistory.js b/models/networkhistory.js
index fc99549..889491a 100644
--- a/models/networkhistory.js
+++ b/models/networkhistory.js
@@ -4,7 +4,8 @@ var mongoose = require('mongoose'),
 var NetworkHistorySchema = new Schema({
   blockindex: {type: Number, default: 0, index: true},
   nethash: { type: Number, default: 0 },
-  difficulty: { type: Number, default: 0 }
+  difficulty_pow: { type: Number, default: 0 },
+  difficulty_pos: { type: Number, default: 0 }
 }, {id: false});
 
 module.exports = mongoose.model('NetworkHistory', NetworkHistorySchema);
\ No newline at end of file
diff --git a/settings.json.template b/settings.json.template
index 8441613..e91b9b0 100644
--- a/settings.json.template
+++ b/settings.json.template
@@ -310,14 +310,22 @@
           //          Set this to any valid html color
           //          Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
           "bgcolor": "#ffffff",
-          // line_color: Change the line color of the network difficulty chart
-          //             Set this to any valid html color
-          //             Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
-          "line_color": "rgba(255, 99, 132, 1)",
-          // fill_color: Change the fill color of the network difficulty chart
-          //             Set this to any valid html color
-          //             Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
-          "fill_color": "rgba(255, 99, 132, 0.2)",
+          // pow_line_color: Change the line color of the network difficulty chart for POW coins
+          //                 Set this to any valid html color
+          //                 Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
+          "pow_line_color": "rgba(255, 99, 132, 1)",
+          // pow_fill_color: Change the fill color of the network difficulty chart for POW coins
+          //                 Set this to any valid html color
+          //                 Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
+          "pow_fill_color": "rgba(255, 99, 132, 0.2)",
+          // pos_line_color: Change the line color of the network difficulty chart for POS coins
+          //                 Set this to any valid html color
+          //                 Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
+          "pos_line_color": "rgba(255, 161, 0, 1)",
+          // pos_fill_color: Change the fill color of the network difficulty chart for POS coins
+          //                 Set this to any valid html color
+          //                 Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
+          "pos_fill_color": "rgba(255, 161, 0, 0.2)",
           // crosshair_color: Change the vertical crosshair line color of the network difficulty chart
           //             Set this to any valid html color
           //             Ex: "#ffffff" or "rgba(255, 255, 255, 1)" or "white"
diff --git a/views/layout.pug b/views/layout.pug
index 6460f17..72bae33 100644
--- a/views/layout.pug
+++ b/views/layout.pug
@@ -434,20 +434,43 @@ html(lang='en')
               if (#{settings.network_history.enabled} == true && #{showDifficultyChart} == true && #{settings.shared_pages.page_header.network_charts.difficulty_chart.enabled} == true) {
                 const ctxDifficulty = document.getElementById('difficultyChart').getContext('2d');
 
+                var diffDataSets = [];
+                var showPOW = false;
+                var showPOS = false;
+
+                for (var i = 0; i < result.length; i++) {
+                  if (result[i].difficulty_pow != 0)
+                    showPOW = true;
+                  if (result[i].difficulty_pos != 0)
+                    showPOS = true;
+                }
+
+                if (showPOS) {
+                  diffDataSets.push({
+                    label: 'POS Difficulty',
+                    data: result.map(function(a) {return a.difficulty_pos;}),
+                    backgroundColor: ['#{settings.shared_pages.page_header.network_charts.difficulty_chart.pos_fill_color}'],
+                    borderColor: ['#{settings.shared_pages.page_header.network_charts.difficulty_chart.pos_line_color}'],
+                    fill: 'start'
+                  });
+                }
+
+                if (showPOW || !showPOS) {
+                  diffDataSets.push({
+                    label: 'POW Difficulty',
+                    data: result.map(function(a) {return a.difficulty_pow;}),
+                    backgroundColor: ['#{settings.shared_pages.page_header.network_charts.difficulty_chart.pow_fill_color}'],
+                    borderColor: ['#{settings.shared_pages.page_header.network_charts.difficulty_chart.pow_line_color}'],
+                    fill: 'start'
+                  });
+                }
+
                 if (difficultyChart == null) {
                   difficultyChart = new Chart(ctxDifficulty, {
                     type: 'line',
                     data: {
                       labels: result.map(function(a) {return a.blockindex;}),
-                      datasets: [
-                        {
-                          label: 'Difficulty',
-                          data: result.map(function(a) {return a.difficulty;}),
-                          backgroundColor: ['#{settings.shared_pages.page_header.network_charts.difficulty_chart.fill_color}'],
-                          borderColor: ['#{settings.shared_pages.page_header.network_charts.difficulty_chart.line_color}'],
-                          fill: 'start'
-                        }
-                      ]
+                      datasets: diffDataSets
                     },
                     options: {
                       maintainAspectRatio: false,
@@ -509,7 +532,29 @@ html(lang='en')
                   $('#difficultyChartParent').fadeIn();
                 } else {
                   difficultyChart.data.labels = result.map(function(a) {return a.blockindex;});
-                  difficultyChart.data.datasets[0].data = result.map(function(a) {return a.difficulty;});
+
+                  if (difficultyChart.data.datasets.length != diffDataSets.length)
+                    difficultyChart.data.datasets = diffDataSets;
+                  else {
+                    if (
+                      (
+                        difficultyChart.data.datasets[0].label.indexOf('POW') > -1 &&
+                        diffDataSets[0].label.indexOf('POW') > -1
+                      )
+                      ||
+                      (
+                        difficultyChart.data.datasets[0].label.indexOf('POS') > -1 &&
+                        diffDataSets[0].label.indexOf('POS') > -1
+                      )
+                    ) {
+                      difficultyChart.data.datasets[0].data = diffDataSets[0].data;
+
+                      if (difficultyChart.data.datasets.length == 2)
+                        difficultyChart.data.datasets[1].data = diffDataSets[1].data;
+                    } else
+                      difficultyChart.data.datasets = diffDataSets;
+                  }
+
                   difficultyChart.update();
                 }
               }