diff --git a/src/Exchanges/Bybit.php b/src/Exchanges/Bybit.php
index 59eb890..2ad1bf9 100644
--- a/src/Exchanges/Bybit.php
+++ b/src/Exchanges/Bybit.php
@@ -5,9 +5,7 @@
 
 namespace Lin\Exchange\Exchanges;
 
-
-use Lin\Bybit\BybitInverse;
-use Lin\Bybit\BybitLinear;
+use Lin\Bybit\BybitV5;
 use Lin\Exchange\Interfaces\AccountInterface;
 use Lin\Exchange\Interfaces\MarketInterface;
 use Lin\Exchange\Interfaces\TraderInterface;
@@ -16,20 +14,14 @@ class BaseBybit
 {
     protected $platform_linear;
     protected $platform_inverse;
-    protected $host;
 
-    function __construct(BybitLinear $platform_linear=null,BybitInverse $platform_inverse=null,$host){
-        $this->platform_linear=$platform_linear;
-        $this->platform_inverse=$platform_inverse;
-        $this->host=$host;
-    }
+    protected $platform_v5;
 
-    protected function checkType(){
-        if(stripos($this->host,'bybitlinear')!==false){
-            return 'bybitlinear';
-        }
+    protected $host;
 
-        return 'bybitinverse';
+    function __construct(BybitV5 $platform_v5,$host){
+        $this->platform_v5=$platform_v5;
+        $this->host=$host;
     }
 }
 
@@ -38,16 +30,7 @@ class AccountBybit extends BaseBybit implements AccountInterface
     /**
      *
      * */
-    function get(array $data){
-        switch ($this->checkType()){
-            case 'bybitinverse':{
-                return ;
-            }
-            case 'bybitlinear':{
-                return ;
-            }
-        }
-    }
+    function get(array $data){}
 }
 
 class MarketBybit extends BaseBybit implements MarketInterface
@@ -56,14 +39,6 @@ class MarketBybit extends BaseBybit implements MarketInterface
      *
      * */
     function depth(array $data){
-        switch ($this->checkType()){
-            case 'bybitinverse':{
-                return ;
-            }
-            case 'bybitlinear':{
-                return ;
-            }
-        }
     }
 }
 
@@ -73,84 +48,36 @@ class TraderBybit extends BaseBybit implements TraderInterface
      *
      * */
     function sell(array $data){
-        switch ($this->checkType()){
-            case 'bybitinverse':{
-                return ;
-            }
-            case 'bybitlinear':{
-                return ;
-            }
-        }
     }
 
     /**
      *
      * */
     function buy(array $data){
-        switch ($this->checkType()){
-            case 'bybitinverse':{
-                return ;
-            }
-            case 'bybitlinear':{
-                return ;
-            }
-        }
     }
 
     /**
      *
      * */
     function cancel(array $data){
-        switch ($this->checkType()){
-            case 'bybitinverse':{
-                return ;
-            }
-            case 'bybitlinear':{
-                return ;
-            }
-        }
     }
 
     /**
      *
      * */
     function update(array $data){
-        switch ($this->checkType()){
-            case 'bybitinverse':{
-                return ;
-            }
-            case 'bybitlinear':{
-                return ;
-            }
-        }
     }
 
     /**
      *
      * */
     function show(array $data){
-        switch ($this->checkType()){
-            case 'bybitinverse':{
-                return $this->platform_inverse->order()->get($data);
-            }
-            case 'bybitlinear':{
-                return $this->platform_linear->order()->get($data);
-            }
-        }
     }
 
     /**
      *
      * */
     function showAll(array $data){
-        switch ($this->checkType()){
-            case 'bybitinverse':{
-                return ;
-            }
-            case 'bybitlinear':{
-                return ;
-            }
-        }
     }
 }
 
@@ -158,70 +85,66 @@ class Bybit
 {
     private $key;
     private $secret;
-    private $passphrase;
     private $host;
 
     protected $type;
 
-    protected $platform_inverse;
-    protected $platform_linear;
+    protected $platform='';
 
-    function __construct($key,$secret,$passphrase,$host=''){
+    protected $platform_v5;
+
+    function __construct($key,$secret,$host=''){
         $this->key=$key;
         $this->secret=$secret;
-        $this->passphrase=$passphrase;
         $this->host=empty($host) ? 'https://api.bybit.com' : $host ;
 
         $this->getPlatform();
     }
 
     function account(){
-        return new AccountBybit($this->platform_linear,$this->platform_inverse,$this->host);
+        return new AccountBybit($this->platform_v5,$this->host);
     }
 
     function market(){
-        return new MarketBybit($this->platform_linear,$this->platform_inverse,$this->host);
+        return new MarketBybit($this->platform_v5,$this->host);
     }
 
     function trader(){
-        return new TraderBybit($this->platform_linear,$this->platform_inverse,$this->host);
+        return new TraderBybit($this->platform_v5,$this->host);
     }
 
     function getPlatform(string $type=''){
         $this->type=strtolower($type);
 
         switch ($this->type){
-            case 'bybitinverse':{
-                return $this->platform_inverse=new BybitInverse($this->key,$this->secret,$this->host);
-            }
-            case 'bybitlinear':{
-                return $this->platform_linear=new BybitLinear($this->key,$this->secret,$this->host);
-            }
             default:{
-                if(stripos($this->host,'bybitlinear')!==false){
-                    $this->type='bybitlinear';
-                    return $this->platform_linear=new BybitLinear($this->key,$this->secret,$this->host);
-                }
-                $this->type='bybitinverse';
-                return $this->platform_inverse=new BybitInverse($this->key,$this->secret,$this->host);
+                return $this->platform_v5=new BybitV5($this->key,$this->secret,$this->host);
             }
         }
     }
 
+    /**
+    Set exchange transaction category, default "spot" transaction. Other options "spot" "margin" "future" "swap"
+     */
+    public function setPlatform(string $platform=''){
+        $this->platform=$platform ?? 'spot';
+        return $this;
+    }
+
+    /**
+    Set exchange API interface version. for example "v1" "v3" "v5"
+     */
+    public function setVersion(string $version=''){
+        $this->version=$version;
+        return $this;
+    }
+
+
     /**
      * Support for more request Settings
      * */
     function setOptions(array $options=[]){
-
-        switch ($this->type){
-            case 'bybitinverse':{
-                $this->platform_inverse->setOptions($options);
-                break;
-            }
-            case 'bybitlinear':{
-                $this->platform_linear->setOptions($options);
-                break;
-            }
-        }
+        $this->options=$options;
+        return $this;
     }
 }
diff --git a/tests/bybit.php b/tests/bybit.php
index 1ad73e5..aa88e00 100644
--- a/tests/bybit.php
+++ b/tests/bybit.php
@@ -22,16 +22,6 @@
     //Set the request timeout to 60 seconds by default
     'timeout'=>10,
 
-    //If you are developing locally and need an agent, you can set this
-    //'proxy'=>true,
-    //More flexible Settings
-    /* 'proxy'=>[
-     'http'  => 'http://127.0.0.1:12333',
-     'https' => 'http://127.0.0.1:12333',
-     'no'    =>  ['.cn']
-     ], */
-    //Close the certificate
-    //'verify'=>false,
 ]);
 
 $action=intval($_GET['action'] ?? 0);//http pattern
@@ -473,6 +463,16 @@
     }
 
 
+    case 2001:{
+        $result=$exchanges->getPlatform()->position()->getList([
+            'category'=>'linear',
+            'symbol'=>'BTCUSDT',
+        ]);
+        print_r($result);
+        break;
+    }
+
+
     default:{
         echo 'nothing';
         //exit;