diff --git a/doc/development/migration.md b/doc/development/migration.md
index 77cf0c11a..47dc911b6 100644
--- a/doc/development/migration.md
+++ b/doc/development/migration.md
@@ -8,19 +8,22 @@
 
 2. Create migration files
 
-```sh
-rockhopper --config rockhopper_sqlite.yaml create --type sql add_pnl_column
-rockhopper --config rockhopper_mysql.yaml create --type sql add_pnl_column
-```
 
-or you can use the util script:
+You can use the util script to generate the migration files:
 
 ```
 bash utils/generate-new-migration.sh add_pnl_column
 ```
 
-Be sure to edit both sqlite3 and mysql migration files. ( [Sample](migrations/mysql/20210531234123_add_kline_taker_buy_columns.sql) )
+Or, you can generate the migration files separately:
 
+```sh
+rockhopper --config rockhopper_sqlite.yaml create --type sql add_pnl_column
+rockhopper --config rockhopper_mysql.yaml create --type sql add_pnl_column
+```
+
+
+Be sure to edit both sqlite3 and mysql migration files. ( [Sample](migrations/mysql/20210531234123_add_kline_taker_buy_columns.sql) )
 
 To test the drivers, you have to update the rockhopper_mysql.yaml file to connect your database,
 then do:
diff --git a/migrations/mysql/20220304153317_add_profit_table.sql b/migrations/mysql/20220304153317_add_profit_table.sql
new file mode 100644
index 000000000..cdb60edb4
--- /dev/null
+++ b/migrations/mysql/20220304153317_add_profit_table.sql
@@ -0,0 +1,38 @@
+-- +up
+CREATE TABLE `profits`
+(
+    `gid`            BIGINT UNSIGNED         NOT NULL AUTO_INCREMENT,
+
+    `exchange`       VARCHAR(24)             NOT NULL DEFAULT '',
+
+    `symbol`         VARCHAR(8)              NOT NULL,
+
+    `trade_id`       BIGINT UNSIGNED         NOT NULL,
+
+    -- average_cost is the position average cost
+    `average_cost`   DECIMAL(16, 8) UNSIGNED NOT NULL,
+
+    -- profit is the pnl (profit and loss)
+    `profit`         DECIMAL(16, 8) NOT NULL,
+
+    -- price is the price of the trade that makes profit
+    `price`          DECIMAL(16, 8) UNSIGNED NOT NULL,
+
+    -- quantity is the quantity of the trade that makes profit
+    `quantity`       DECIMAL(16, 8) UNSIGNED NOT NULL,
+
+    -- quote_quantity is the quote quantity of the trade that makes profit
+    `quote_quantity` DECIMAL(16, 8) UNSIGNED NOT NULL,
+
+    -- side is the side of the trade that makes profit
+    `side`           VARCHAR(4)              NOT NULL DEFAULT '',
+
+    `traded_at`      DATETIME(3)             NOT NULL,
+
+    PRIMARY KEY (`gid`),
+
+    UNIQUE KEY `trade_id` (`trade_id`)
+);
+
+-- +down
+DROP TABLE IF EXISTS `profits`;
diff --git a/migrations/sqlite3/20220304153309_add_profit_table.sql b/migrations/sqlite3/20220304153309_add_profit_table.sql
new file mode 100644
index 000000000..73eab6853
--- /dev/null
+++ b/migrations/sqlite3/20220304153309_add_profit_table.sql
@@ -0,0 +1,34 @@
+-- +up
+CREATE TABLE `profits`
+(
+    `gid`            INTEGER PRIMARY KEY AUTOINCREMENT,
+
+    `exchange`       VARCHAR(24)             NOT NULL DEFAULT '',
+
+    `symbol`         VARCHAR(8)              NOT NULL,
+
+    `trade_id`       INTEGER                 NOT NULL,
+
+    -- average_cost is the position average cost
+    `average_cost`   DECIMAL(16, 8) NOT NULL,
+
+    -- profit is the pnl (profit and loss)
+    `profit`         DECIMAL(16, 8) NOT NULL,
+
+    -- price is the price of the trade that makes profit
+    `price`          DECIMAL(16, 8) NOT NULL,
+
+    -- quantity is the quantity of the trade that makes profit
+    `quantity`       DECIMAL(16, 8) NOT NULL,
+
+    -- quote_quantity is the quote quantity of the trade that makes profit
+    `quote_quantity` DECIMAL(16, 8) NOT NULL,
+
+    -- side is the side of the trade that makes profit
+    `side`           VARCHAR(4)              NOT NULL DEFAULT '',
+
+    `traded_at`      DATETIME(3)             NOT NULL
+);
+
+-- +down
+DROP TABLE IF EXISTS `profits`;
diff --git a/rockhopper_mysql.yaml b/rockhopper_mysql.yaml
index a0b6e7864..d8b459dbb 100644
--- a/rockhopper_mysql.yaml
+++ b/rockhopper_mysql.yaml
@@ -1,6 +1,15 @@
+# vim:filetype=yaml:
+# you can copy this file to rockhopper_mysql_local.yaml to have your modification
 ---
 driver: mysql
 dialect: mysql
-dsn: "root@tcp(localhost:3306)/bbgo_dev?parseTime=true"
-# dsn: "root@tcp(localhost:3306)/bbgo_backtest?parseTime=true"
+
+# unix socket connection to mysql with password
+# dsn: "root:123123@unix(/opt/local/var/run/mysql57/mysqld.sock)/bbgo_dev?parseTime=true"
+
+# tcp connection to mysql with password
+# dsn: "root:123123@tcp(localhost:3306)/bbgo_dev?parseTime=true"
+
+# tcp connection to mysql without password
+# dsn: "root@tcp(localhost:3306)/bbgo_dev?parseTime=true"
 migrationsDir: migrations/mysql