BBGO v1.15.3

Improvements

• Added more FTX implementation, thanks @ycdesu
• Improved bollgrid order checking logics, thanks @LarryLuTW
• Use GTC time in force by default, thanks @aitjcize
• Added IOC order type support for MAX, thanks @chechiachang
• Upgraded Binance API to v2.2.1, thanks @zenixls2

Bug Fixes

• Fixed symbol column issue by extending width to 12, thanks @jnlin
• Fixed placeorder command for the price, quantity formatting.
• Fixed position accessor for empty positions.