From 40d44078dc8e7b41aafcb37539fedb55d03e4f6a Mon Sep 17 00:00:00 2001
From: c9s <yoanlin93@gmail.com>
Date: Sat, 4 Jun 2022 00:14:13 +0800
Subject: [PATCH] explain ID and strategy struct

---
 doc/topics/developing-strategy.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/doc/topics/developing-strategy.md b/doc/topics/developing-strategy.md
index 4fe89b086..c28f590a1 100644
--- a/doc/topics/developing-strategy.md
+++ b/doc/topics/developing-strategy.md
@@ -41,12 +41,32 @@ To use the Symbol setting, you can get the value from the Run method of the stra
 
 ```
 func (s *Strategy) Run(ctx context.Context, session *bbgo.ExchangeSession) error {
+    // you need to import the "log" package
     log.Println("%s", s.Symbol)
     return nil
 }
 ```
 
+Now you have the Go struct and the Go package, but BBGO does not know your strategy,
+so you need to register your strategy.
 
+Define an ID const in your package:
+
+```
+const ID = "short"
+```
+
+Then call bbgo.RegisterStrategy with the ID you just defined and a struct reference:
+
+```
+func init() {
+	bbgo.RegisterStrategy(ID, &Strategy{})
+}
+```
+
+Note that you don't need to fill the fields in the struct, BBGO just need to know the type of struct.
+
+(BBGO use reflect to parse the fields from the given struct and allocate a new struct object from the given struct type internally)
 
 
 ## Built-in Strategy