Barindex – tradeindex trailing stop

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02/19/2021 at 2:54 PM #161997 quote
Albaran
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Average
Hi there,

I’m having trouble visualizing how to code a longstop using the following line of code:
```
Longstop = average[barindex - tradeindex](close)
```
In this example, the system will stop immediately because the indicator has received a parameter that isn’t a number (that’s what PRT says even though I’m not sure to understand this.)

Be that as it may, to thwart this, I simply modified the previous line of code like this:
```
Longstop = average[barindex + 1 - tradeindex](close)
```
Now the question that I’m asking myself is whether I need to update the close into Close[1] so as to include the close at the moment I’m in the market in my longstop?

Because BarIndex has been artificially advanced, does that mean that I have to go back further in time in order for the longstop to take into consideration the close at the moment I’m in the market?

I would assume so but I’d like a second opinion! Thanks for getting back to me, would be much appreciated!
02/19/2021 at 3:33 PM #162011 quote

robertogozzi
Moderator

Legend

In your first example at extremes barindex – tradeindex can be 0 (which returns an error) or a huge number (such as 1450 or 21716,…).

In your second example, say barindex= 280 and tradeindex=275, the difference is 6, that is CLOSE[0] (which is barindex 280) through CLOSE[5] (which is barindex 275), so you do NOT need to use [1] next to CLOSE.

02/19/2021 at 3:55 PM #162014 quote

Albaran
Participant

Average

I forgot to mention that the longstop also needs to kick in at the very next bar I’m in the market – like a normal stop behavior sort to speak! Does that change anything?

02/19/2021 at 4:22 PM #162018 quote

robertogozzi
Moderator

Legend

No, it doesn’t, since BARINDEX will increase and the result of the expression will, as well. Nothing changes!

Albaran thanked this post

02/19/2021 at 4:40 PM #162022 quote

Albaran
Participant

Average

Okay, thanks a lot! I guess i got confused because of the addition of that +1 constant 🙂
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