Pinescript TradingView Backtesting Strategies with Trailing Stop Function

0
votes

I am trying to backtest a "Long" strategy in tradingview using trailing stops. For example I want to be able to open a long with a 2% target above price, a stop loss of 1% below price, and a trailing stop activation of 1% once it reaches the 2% target price. Please help, thanks very much.

So far I've managed to backtest with fixed Targets (% above price) and Fixed stops (% below price). 

tp_inp = input(2, title='Take Profit %', type=float,step=.1)/100
sl_inp = input(1, title='Stop Loss %', type=float,step=.1)/100
trail_inp = input(1, title='Trailing %', type=float,step=.1)/100

stop_level = strategy.position_avg_price * (1 - sl_inp)
take_level = strategy.position_avg_price * (1 + tp_inp)
trail_level = strategy.position_avg_price * (1 - trail_inp)

strategy.entry("Long", true, when = buysignal == 1)

strategy.exit("Exit","Long", stop=stop_level, trail_price=take_level, trail_offset=trail_level)

I just can't wrap around my head to get the trailing stop work in the backtest. I am just able to do it with fixed stops.

2
pine-script

2 Answers

0
votes

According to pine script reference https://www.tradingview.com/pine-script-reference/v4/#fun_strategy{dot}exit, trail_offset has to be specified in ticks. In your code, a price is specified for trail_offset.

A possible solution would be to get the min tick for the symbol with syminfo.mintick and calculate how much 1% of the current price is in ticks:

trail_offset = int(close * trail_inp / syminfo.mintick)

strategy.exit("Exit","Long", stop=stop_level, trail_price=take_level, trail_offset=trail_offset)
-1
votes

leave only 

strategy.exit("Long", stop=stop_level, trail_price=take_level, trail_offset=trail_level)