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Trailing stop loss!
Roman Sterlin
posted Aug 23, 2015
API Seeking Help

does anyone have a ready code for:
a Trailing stop loss that,
after I short it will see 0.30c profit, and start going down 5c each time the stock price goes down.

EXAMPLE:
stock price is 10$ and I short at 10$ the stop loss starts at 10.30$ (30c stop loss of the shorting price)
stock goes down to 9.70$ (0,30c profit).
stop loss goes to 9.75$
stock goes down to 9.65$
stop loss goes to 9.70$
stock goes down to 9.60$
stop loss goes down to 9.65$
etc...

Is it hard to make it? does anyone have one ready to share? something simmilar ?

Thanks ALOT!

1 response
Stefan Kaehler
Aug 23, 2015

Hi Roman - I found this simple code from someone else in the Quantopian community that works well. It will return a price amount that doesn't decrease which you can build trading logic around. You should be able to adapt it to your needs.

def set_trailing_stop(context,data):  
      price = data[context.stock].price  
      context.stop_price = max(context.stop_price, context.stop_pct * price)  
      return context.stop_price

Hope this helps!
-Stefan

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