## Tick source, Bid or Ask

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### Tick source, Bid or Ask

Hi,

When I apply an indicator to a tick chart, what is its source, is it Bid or Ask? Is it an average between both? Does it depend on which source I am visualizing on chart (Bid or Ask buttons)?

Thanks,
sosinsky

Posts: 23
Joined: Tue Feb 10, 2015 11:21 am

### Re: Tick source, Bid or Ask

It will be Ask or Bid.
I have to say we have one problem here.
Bid is used by default.
If you want to use Ask, turn off Bid.
Add Indicator, turn on Bid.
Will alert the development team about this issue.

Apprentice
FXCodeBase: Confirmed User

Posts: 19851
Joined: Thu Dec 31, 2009 11:59 am
Location: Zagreb, Croatia

### Re: Tick source, Bid or Ask

I've another question about bid and ask
How can I get the stream of the bid ask median (ask + bid / 2) and apply indicator on it?
Currently I have:
t1_bid = ExtSubscribe(id_t1_bid, symbol, t1, true, "bar");
t1_ask = ExtSubscribe(id_t1_ask, symbol, t1, false, "bar");

And then do:
Code: Select all
`        if canCalculate( t1_ask , getClosedPeriod(t1_ask, t1_ask:size() - 1) )  and canCalculate( t1_bid , getClosedPeriod(t1_bid, t1_bid:size() - 1) )  then            mid_tick = (t1_ask[getClosedPeriod(t1_ask, t1_ask:size() - 1) ] + t1_bid[getClosedPeriod(t1_bid, t1_bid:size() - 1)]) / 2;        end  `

But I can not apply any indicator on this "mid_tick". So I calculate the indicators twice (bid and ask) and then do the same (ask + bid /2) on each stream of the indicator data
But I was hoping I can just calculate the mid tick and then apply indicator on it like
core.indicators:create("INDICATOR",Mid_Tick...
Never chase the money, let the money come to me

Cactus
FXCodeBase: Graduate

Posts: 231
Joined: Fri Feb 19, 2016 11:46 am
Location: Errywhere

### Re: Tick source, Bid or Ask

You can use Bid Ask Median indicator as an external source for indicator calculation.
viewtopic.php?f=17&t=63487

Apprentice
FXCodeBase: Confirmed User

Posts: 19851
Joined: Thu Dec 31, 2009 11:59 am
Location: Zagreb, Croatia

### Re: Tick source, Bid or Ask

Thank you. If it gets solved let me know. For now I will switch between them.
Just another question, what is the limit of tick/second of TradingStation?
I read that some API can have up to 200 tick/second but yea what is the limit of Trading Station?

Thaks,
sosinsky

Posts: 23
Joined: Tue Feb 10, 2015 11:21 am

### Re: Tick source, Bid or Ask

I believe this is determined by market conditions, FXCM servers. Not by TS.

Apprentice
FXCodeBase: Confirmed User

Posts: 19851
Joined: Thu Dec 31, 2009 11:59 am
Location: Zagreb, Croatia

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