help with automated strategy

March 28th, 2016, 04:39 AM

hello everyone,

because nt is free and because it has superior order management capabilities to other platforms i have been trying to code some simple ideas as automated strategies.

however, i have run into some unsolvable issues with variables, functions, properties and nt limitations. therefore i could use some help in coding what must be a very simple strategy for people who know what they are doing.

i would greatly appreciate if i can get help in coding a simple strategy that made trades following bollinger's bands:

if price (0) >= bollinger's upper band
enter long

if price (0) <= upper band
exit all long positions

if price (0) <= lower band
enter short

if price (0) <= lower band
exit all short positions

what i am having the most issues with is being able to have nt compare price (0) to the upper / lower bands (error message says operand can't be applied). also, i haven't been able to figure out how to define the equations used for the upper / middle / lower bands (which require elementary arithmetic operations) so that nt can then use them (as doubles? as data series? other?).

thanks a lot, regards.

March 30th, 2016, 01:26 AM

@NTDeveloper

man, thanks a lot. the code you provided works perfectly and does just what was requested.

i still could use some help with the strategy i'm trying to put together. if i wanted to define two lines of my own (longline, shortline) how could i define a couple of lines that performed the following operations and what kind of properties should they have so that nt can apply the same operands (>, <, =) between these lines and the price on close?

let's say the inputs for the bollinger bands were not hard coded into the strategy but were left as input variables so that they could be optimized: longperiod, longconstant, shortperiod and shortconstant.

the lines would then be:

longline = sma (longperiod) + ( longconstant * stdv (longperiod))

shortline = sma (shortperiod ) - ( shortconstant* stdv (shortperiod ))

i haven't been able to get this kind of adjustable bollinger bands to work on nt, not by defining them as double variables, nor integers nor data sets. it must be some very basic mistake i keep making, but i hope someone with a lot more experience coding on nt can help me get past this obstacle.

help with automated strategy

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help with automated strategy