Pine Script：开盘策略后退出策略 X 柱

Question

I am trying to close a strategy either after it crosses above the MA or after 50 bars, whichever comes first

I have been trying to look into and it seems "barstate.isconfirmed" or "barsince" function should be used.

Currently I have the below, what do I need to add to include closing after 50 bars?

strategy.close("buy",when = close[0]>basis 

Answer 1

You can use the strategy.opentrades.entry_bar_index built-in variable to get the bar index of the open trade. Then compare it with the current bar index.

n = 50
open_idx = strategy.opentrades.entry_bar_index(strategy.opentrades-1)
diff_idx = bar_index - open_idx

if (diff_idx >= n)
    strategy.close("buy")