diff --git a/README.md b/README.md
index 38723fb..725a985 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,28 @@ myAddress.sendAsset(otherAddress, myToken, 50)
 
 ```
 
+#### Code Example using a different asset for the matcher fee on a DeX and placing an order
+```python
+import PyCWaves
+pw = PyCWaves.PyCWaves()
+
+pw.setMatcher(node='https://dex.polarity.exchange')
+pw.setDatafeed(wdf='https://api.marketdata.turtlenetwork.eu/')
+pw.setNode('https://node.mortysnode.nl', 'turtlenetwork', 'L')
+pw.DEFAULT_CURRENCY = 'TN'
+pw.DEFAULT_MATCHER_FEE_ASSET_ID = '7RB3BWayeCVPq3kkpkeJZAFv2DYCB5gEwnutEpRofaw4' #USDT is set as the asset for the matcher fee
+pw.DEFAULT_MATCHER_FEE = int(0.01 * pow(10, 6))
+
+myAddress = pw.Address(privateKey='CtMQWJZqfc7PRzSWiMKaGmWFm4q2VN5fMcYyKDBPDx6S')
+
+amount_asset = pw.Asset('AVJc3uYu8HdjQEx4rroaq6v4Xv4L1etG1tQPeuqs38Sf')
+price_asset = pw.Asset('7RB3BWayeCVPq3kkpkeJZAFv2DYCB5gEwnutEpRofaw4')
+pair = pw.AssetPair(amount_asset, price_asset)
+o = myAddress.sell(assetPair=pair, amount=1000000, price=2354, maxLifetime=86400)
+print(o.orderId)
+
+```
+
 ### Address Class
 __pywaves.Address(address, publicKey, privateKey, seed)__ _Creates a new Address object_
 
diff --git a/__init__.py b/__init__.py
index 5c0948b..8d42fce 100644
--- a/__init__.py
+++ b/__init__.py
@@ -39,6 +39,7 @@ def __init__(self):
         self.DEFAULT_SET_SCRIPT_FEE = 1000000
         self.DEFAULT_INVOKE_SCRIPT_FEE = 500000
         self.DEFAULT_CURRENCY = 'WAVES'
+        self.DEFAULT_MATCHER_FEE_ASSET_ID = self.DEFAULT_CURRENCY
         self.VALID_TIMEFRAMES = (5, 15, 30, 60, 240, 1440)
         self.MAX_WDF_REQUEST = 100
 
diff --git a/address.py b/address.py
index 54366fa..40f078d 100644
--- a/address.py
+++ b/address.py
@@ -696,35 +696,70 @@ def _postOrder(self, amountAsset, priceAsset, orderType, amount, price, maxLifet
         expiration = timestamp + maxLifetime * 1000
         asset1 = b'\0' if amountAsset.assetId=='' else b'\1' + base58.b58decode(amountAsset.assetId)
         asset2 = b'\0' if priceAsset.assetId=='' else b'\1' + base58.b58decode(priceAsset.assetId)
-        sData = b'\2' + \
-                base58.b58decode(self.publicKey) + \
-                base58.b58decode(self.pycwaves.MATCHER_PUBLICKEY) + \
-                asset1 + \
-                asset2 + \
-                orderType + \
-                struct.pack(">Q", price) + \
-                struct.pack(">Q", amount) + \
-                struct.pack(">Q", timestamp) + \
-                struct.pack(">Q", expiration) + \
-                struct.pack(">Q", matcherFee)
-        signature = crypto.sign(self.privateKey, sData)
-        otype = "buy" if orderType==b'\0' else "sell"
-        data = json.dumps({
-            "senderPublicKey": self.publicKey,
-            "matcherPublicKey": self.pycwaves.MATCHER_PUBLICKEY,
-            "assetPair": {
-                "amountAsset": amountAsset.assetId,
-                "priceAsset": priceAsset.assetId,
-                },
-            "orderType": otype,
-            "price": price,
-            "amount": amount,
-            "timestamp": timestamp,
-            "expiration": expiration,
-            "matcherFee": matcherFee,
-            "signature": signature,
-            "version": 2
-        })
+        if self.pycwaves.DEFAULT_MATCHER_FEE_ASSET_ID != self.pycwaves.DEFAULT_CURRENCY: 
+            sData = b'\3' + \
+                    base58.b58decode(self.publicKey) + \
+                    base58.b58decode(self.pycwaves.MATCHER_PUBLICKEY) + \
+                    asset1 + \
+                    asset2 + \
+                    orderType + \
+                    struct.pack(">Q", price) + \
+                    struct.pack(">Q", amount) + \
+                    struct.pack(">Q", timestamp) + \
+                    struct.pack(">Q", expiration) + \
+                    struct.pack(">Q", matcherFee) + \
+                    b'\1' + \
+                    base58.b58decode(self.pycwaves.DEFAULT_MATCHER_FEE_ASSET_ID)
+            signature = crypto.sign(self.privateKey, sData)
+            otype = "buy" if orderType==b'\0' else "sell"
+            data = json.dumps({
+                "senderPublicKey": self.publicKey,
+                "matcherPublicKey": self.pycwaves.MATCHER_PUBLICKEY,
+                "assetPair": {
+                    "amountAsset": amountAsset.assetId,
+                    "priceAsset": priceAsset.assetId,
+                    },
+                "orderType": otype,
+                "price": price,
+                "amount": amount,
+                "timestamp": timestamp,
+                "expiration": expiration,
+                "matcherFee": matcherFee,
+                "signature": signature,
+                "matcherFeeAssetId" : self.pycwaves.DEFAULT_MATCHER_FEE_ASSET_ID,
+                "version": 3
+            })
+        else:
+            sData = b'\3' + \
+                    base58.b58decode(self.publicKey) + \
+                    base58.b58decode(self.pycwaves.MATCHER_PUBLICKEY) + \
+                    asset1 + \
+                    asset2 + \
+                    orderType + \
+                    struct.pack(">Q", price) + \
+                    struct.pack(">Q", amount) + \
+                    struct.pack(">Q", timestamp) + \
+                    struct.pack(">Q", expiration) + \
+                    struct.pack(">Q", matcherFee) + \
+                    b'\0'
+            signature = crypto.sign(self.privateKey, sData)
+            otype = "buy" if orderType==b'\0' else "sell"
+            data = json.dumps({
+                "senderPublicKey": self.publicKey,
+                "matcherPublicKey": self.pycwaves.MATCHER_PUBLICKEY,
+                "assetPair": {
+                    "amountAsset": amountAsset.assetId,
+                    "priceAsset": priceAsset.assetId,
+                    },
+                "orderType": otype,
+                "price": price,
+                "amount": amount,
+                "timestamp": timestamp,
+                "expiration": expiration,
+                "matcherFee": matcherFee,
+                "signature": signature,
+                "version": 3
+            })
         req = self.pycwaves.wrapper('/matcher/orderbook', data, host=self.pycwaves.MATCHER)
         id = -1
         if 'status' in req: