Hi,

I was taught that pointer is stored with address and series is an array.

So what is the address of this sentence below stored to Price pointer?
or the address itself is the price value here?

var *Price = series(price());

In the sentence below, Why it is not using "*Trend" instead of just "Trend"?
When I want to use the latest value of trend, don't I use (*Trend(0))?

if(valley(Trend))

I took those sentence from the script below.

Thanks in advance.

Yes, a series is an array. In C an array has the type of a pointer.

The pointer has the name "Price", while "var *Price" is used in the definition to indicate that it's a var pointer and not a var. The "*" does not belong to the name.

The latest value of Trend is Trend[0]. To make the confusion complete, in C you can also write "*Trend", which is the same as Trend[0]. However in all examples we write Trend[0] and use "*Trend" only in the definition.

Thank you for your reply.

In the code below,
Don't need to put * in the function parameter?

For example,If I use * in it, the code will be look like this:

var *Price = series(price());
var *DomPeriod = series(DominantPeriod(*Price,30));
var LowPeriod = LowPass(*DomPeriod,500);
var *HP = series(HighPass(*Price,LowPeriod));
var *Signal = series(Fisher(*HP,500));

and for *DomPeriod,
It is calculated with 30 bars and in the next line, then It calculates 500 bars.
I don't understand this.
How many bars are stored in the first line?

Thanks in advance.

// calculate the buy/sell signal
var *Price = series(price());
var *DomPeriod = series(DominantPeriod(Price,30));
var LowPeriod = LowPass(DomPeriod,500);
var *HP = series(HighPass(Price,LowPeriod));
var *Signal = series(Fisher(HP,500));
var Threshold = 1.0;

No, the * in the function parameter is wrong. In C, adding a '*' means getting the content of the series. But the function does not want the content, it wants the series as a parameter. The '*' is not a part of the name.

The '500' in the LowPass line is the period for the lowpass filter.

- We've gotten many similar questions, the '*' before the name seems to be a source of confusion for people learning C. Because knowing pointers is not really required for strategy development, in the next tutorial version we'll avoid it altogether and will define series without the '*'. So if the '*' confuses you, just forget it and switch to the new online tutorial:

http://zorro-trader.com/manual/en/tutorial_trade.htm

Thank you for your guide.

Anyway if we have images in the tut it would be better.