Understanding multi instrument strategies

[dafonseca]

below two code versions using multi instrument techniques. The 1 checks condition on inst[1] using BIP==1. And them checks a condition on inst[0] and another condition on inst[1]. number 2 checks all condition in inst[1] and them checks instrumnet [0] without BIP==0.
1-Is there any rule regarding BIP and inst x y z condition?
2-can I mixes condition on different instruments?
3-Do I have to use BIP??
4-can I use BIP==0 and check a condition on inst[1]?


1) if (BarsInProgress == 1 && (priorClosePrice-Medians[1][0]> -deltaVX) && (priorClosePrice-Medians[1][0]< deltaVX))
{

if (CrossAbove(Medians[0], Bollinger( BarsArray[0], NumberStdDev, Period).Lower, 1) && (Medians[1][0] > SMA (BarsArray[1],SMACycle)[0]))
{
EnterLong(0,positionTaken,priorClosePrice.ToString ());
}
}
<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>
2) if ((priorClosePrice-Medians[1][0]> -deltaVX) && (priorClosePrice-Medians[1][0]< deltaVX) && (Medians[1][0] > SMA (BarsArray[1],SMACycle)[0]))
{

if (BarsInProgress == 0 && CrossAbove(Medians[0], Bollinger( BarsArray[0], NumberStdDev, Period).Lower, 1))
{
EnterLong(0,positionTaken,(deltaVX).ToString());
}
}

[NinjaTrader_Lance]

1-Is there any rule regarding BIP and inst x y z condition?

I'm not sure I fully understand this question but I think my answers to the following should help.

2-can I mixes condition on different instruments?

Yes, see answer to #4

3-Do I have to use BIP??

You will need some sort of BIP filtering otherwise you will get all your instruments making calls to the same condition set

4-can I use BIP==0 and check a condition on inst[1]?

if(BarsInProgress == 0)
{
//this condition would check the SMA of the secondary instrument against the closing price of the 2nd instrument
if( SMA(BarsArray[1], 20)[0] > Closes[1][0])
//do something
}

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?barsarray.htm

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?closes.htm

Very important information if you haven't read already: http://www.ninjatrader.com/support/h...nstruments.htm

As a side note in your example you wouldn't need to check the barsarray if you knew the BIP you were in and needed the value from that same BIP

if(BarsInProgress == 0)
{
//this condition would check the SMA of the primary instrument against the closing price of the primary instrument
if( SMA( 20)[0] > Close[0])
//do something
}

[dafonseca]

I will read it carefully.
But, Can we say that: supposing we ve added instrument[0], inst[1] and inst [2]
if BIP==0
instrument[0] is the inst we are running the strategy on (zero)? and instrument[1] is the first added inst (equal [1]) and so on?
and
id BIP==1
instrument[0] is the first added instrument (inst[1] on top) and instrument [1] will be the second insturment added (inst[2] on top)???

[NinjaTrader_Lance]

Sounds like you have it correct.

BIP == 0 will always be the Chart series (primary)

BIP==1 will always be the first instrument/series added

[dafonseca]

I was meaning something different..
so, to make it clear.
no matter what BIP am I. BIP==1 or BIP==2,
Medians[0] will ALLWAYS be related to the current chart.
Is that correct?

[NinjaTrader_Lance]

That is correct

[dafonseca]

So My last question would be:
regarding conditions to trigger buy and sell orders,
When I need to use BIP==...? Is there any specfic situation?
(or working with Medians[0] and [1]... I can handle instruments well);

[sledge]

I was meaning something different..
so, to make it clear.
no matter what BIP am I. BIP==1 or BIP==2,
Medians[0] will ALLWAYS be related to the current chart.
Is that correct?

I had some major complaints with this in Market Replay... One of my "earlier" posts...

but at some point, everything appeared to clear up, and behaves as expected as far as I can tell.

(this was early nt 7.0 releases)..

[sledge]

So My last question would be:
regarding conditions to trigger buy and sell orders,
When I need to use BIP==...? Is there any specfic situation?
(or working with Medians[0] and [1]... I can handle instruments well);

It depends on your logic and what you are trying to accomplish.

What is your specific situation? I don't know!