@@ -0,0 +1,254 @@
+interface ItradingPlaform%0A%7B%0A%09double getBid(String securityName);%0A%0A%09double getAsk(String securityName);%0A%0A%09double getCash();%0A%0A%09ArrayList%3CString%3E getSecurities();%0A%0A%09bool bid();%0A%0A%09bool ask();%0A%0A%09bool clearBid();%0A%0A%09bool clearAsk();%0A%0A%09bool closeConnection();%0A%0A%7D

build a trading interface!