Looping within a screener and how to use RemoveSameSignals

Looping within a screener and how to use RemoveSameSignals

GS
2012-11-05 16:37:00

Hi,

How do I do the following within a screener:

aa = (5,10,1);

b1 = cross(ema(close,aa), ema(close,(aa+5));

buy = b1 (aa = 1) or b1(aa = 2) ......... or b1(aa = 10)

Basically I am looking for a simple loop within which I can check if the above condition is satisfied. As of now I can write 10 times, however I would prefer a compact statement.

Also, I would appreciate if you could explain how to use RemoveSameSignals( ARRAY array, ARRAY array). I want to use it to remove similar multiple signals.

Thanks

QuantShare
2012-11-06 11:42:44

To create a compact statement you would have to implement a custom script using C#

RemoveSameSignals: Returns 1 on the first occurence of 'true' signal in the first array.
then Returns 0 until the array become 'false' then 'true'.

"true" means 1 and "false" means 0.

GS
2012-11-06 12:18:44

RemoveSameSignals: Returns 1 on the first occurence of 'true' signal in the first array.
then Returns 0 until the array become 'false' then 'true'.

"true" means 1 and "false" means 0.

Still it is not clear, would appreciate if you could give a live example which I can plot and see the difference between with and without this function.

QuantShare
2012-11-06 18:13:40

a = rsi(14) > 70;
plot(a, "");

b = RemoveSameSignals(a);
plot(b, "", colorBlue);

GS
2012-11-08 05:57:15

OK, I did the following:

buy = buy_rule;
sell = sell_rule;

buy = RemoveSameSignals(buy,sell);
sell = RemoveSameSignals(sell,buy);

with this I was able to remove multiple buy, sell signals. Looks like this might be a good function for the day trading, however, on EoD chart it would pull you out of the trade much earlier. Do let me know if my observation is correct.

Thanks

QuantShare
2012-11-08 08:38:44

Yes. You can always use the "plot" function to see the impact of a function visually.

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