Restrict the number of open positions in a strategy

Open Positions keyword is used to limit the trades to a certain number, greater than once or just 1. This keyword can be used to control number stocks in the list are currently trading (means placed order)

Please note that Open Positions keyword only works when there is delay between positions of two instruments.
if the signals for all instruments come at the same time then this keyword will not work
Limiting the positions can only be done by reducing your list size there is no other way.
For detailed explanation with examples please check this video - https://youtu.be/5d9Uv6Ye910