diff --git a/src/ch/zhaw/catan/Bank.java b/src/ch/zhaw/catan/Bank.java
index 6b498c4..0eedb95 100644
--- a/src/ch/zhaw/catan/Bank.java
+++ b/src/ch/zhaw/catan/Bank.java
@@ -21,10 +21,10 @@ public class Bank {
         }
     }
 
-    public boolean tradeWithBank(Config.Resource resourceToReceive, Config.Resource resourceToGive) {
-        if(resources.get(resourceToReceive) >= 1){
-            Integer newResourceReceived = resources.get(resourceToReceive) + 4;
-            Integer newResourcesGiven = resources.get(resourceToGive) - 1;
+    public boolean tradeWithBank(Config.Resource resourceToReceive, Config.Resource resourceToGive, int toWant, int toGive) {
+        if(resources.get(resourceToReceive) >= toWant){
+            Integer newResourceReceived = resources.get(resourceToReceive) + toGive;
+            Integer newResourcesGiven = resources.get(resourceToGive) - toWant;
             resources.put(resourceToReceive, newResourceReceived);
             resources.put(resourceToGive, newResourcesGiven);
             return true;
diff --git a/src/ch/zhaw/catan/SiedlerGame.java b/src/ch/zhaw/catan/SiedlerGame.java
index b76c075..a0d6431 100644
--- a/src/ch/zhaw/catan/SiedlerGame.java
+++ b/src/ch/zhaw/catan/SiedlerGame.java
@@ -27,7 +27,7 @@ public class SiedlerGame {
   private SiedlerBoard board;
   private Player[] allPlayers;
   private int winPoints;
-
+  private Bank bank;
   /**
    * Constructs a SiedlerGame game state object.
    * 
@@ -38,6 +38,7 @@ public class SiedlerGame {
    *     three or players is not between two and four
    */
   public SiedlerGame(int winPoints, int numberOfPlayers) {
+    bank = new Bank();
     board = new SiedlerBoard();
     board.createFixGamefield();
     allPlayers = new Player[numberOfPlayers];
@@ -248,7 +249,7 @@ public class SiedlerGame {
    */
   public boolean tradeWithBankFourToOne(Resource offer, Resource want) {
     // TODO: Implement
-    return false;
+    return bank.tradeWithBank(want,offer, FOUR_TO_ONE_TRADE_WANT, FOUR_TO_ONE_TRADE_OFFER);
   }
 
   /**