diff --git a/src/mining.cpp b/src/mining.cpp
index dc4e5db..d96709a 100644
--- a/src/mining.cpp
+++ b/src/mining.cpp
@@ -18,10 +18,12 @@ unsigned long Mhashes = 0;
 unsigned long totalKHashes = 0;
 unsigned long elapsedKHs = 0;
 
-unsigned long halfshares; // increase if blockhash has 16 bits of zeroes
 unsigned int shares; // increase if blockhash has 32 bits of zeroes
 unsigned int valids; // increased if blockhash <= target
 
+// Track best diff
+double best_diff = 0.0;
+
 // Variables to hold data from custom textboxes
 extern char poolString[80];
 extern int portNumber;
@@ -301,14 +303,18 @@ void runMiner(void * task_id) {
         nonce += 2;
         continue;
       }
-      halfshares++;
-      
+
       //Check target to submit
       //Difficulty of 1 > 0x00000000FFFF0000000000000000000000000000000000000000000000000000
       //NM2 pool diff 1e-9 > Target = diff_1 / diff_pool > 0x00003B9ACA00....00
       //Swapping diff bytes little endian >>>>>>>>>>>>>>>> 0x0000DC59D300....00  
       //if((hash[29] <= 0xDC) && (hash[28] <= 0x59))     //0x00003B9ACA00  > diff value for 1e-9
       double diff_hash = diff_from_target(hash);
+
+      // update best diff
+      if (diff_hash > best_diff)
+        best_diff = diff_hash;
+
       if(diff_hash > mMiner.poolDifficulty)//(hash[29] <= 0x3B)//(diff_hash > 1e-9)
       {
         tx_mining_submit(client, mWorker, mJob, nonce);
diff --git a/src/monitor.cpp b/src/monitor.cpp
index cdc1da6..6c16b04 100644
--- a/src/monitor.cpp
+++ b/src/monitor.cpp
@@ -19,9 +19,10 @@ extern unsigned long Mhashes;
 extern unsigned long totalKHashes;
 extern unsigned long elapsedKHs;
 
-extern unsigned long halfshares; // increase if blockhash has 16 bits of zeroes
 extern unsigned int shares; // increase if blockhash has 32 bits of zeroes
-extern unsigned int valids; // increased if blockhash <= targethalfshares
+extern unsigned int valids; // increased if blockhash <= target
+
+extern double best_diff; // track best diff
 
 extern OpenFontRender render;
 extern TFT_eSprite background;
@@ -243,9 +244,11 @@ void show_MinerScreen(unsigned long mElapsed){
     //Block templates
     render.setFontSize(36);
     render.drawString(String(templates).c_str(), 186, 20, 0xDEDB);
-    //16Bit shares
+    //Best diff
+    char best_diff_string[8] = {0};
+    sprintf(best_diff_string, "%.4f", best_diff);
     render.setFontSize(36);
-    render.drawString(String(halfshares).c_str(), 186, 48, 0xDEDB);
+    render.drawString(String(best_diff_string).c_str(), 186, 48, 0xDEDB);
     //32Bit shares
     render.setFontSize(36);
     render.drawString(String(shares).c_str(), 186, 76, 0xDEDB);