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AAPL Tape Reading Question
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AAPL Tape Reading Question

  #1 (permalink)
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AAPL Tape Reading Question

Today, AAPL's opening candle was up $1.87.
Bid Vol was 284,723 (a negative number)
Ask Vol was 104,258 (a positive number)
Cum Delta, using above numbers, was -180,465
Cum Delta increase per SC study, using IQFeed data, was +214,000 +/-

What reasons might explain CumDelta, in the above described scenario, being shown as a positive number?

Also today, AAPL's 1 PM candle was down $00.11.
Bid Vol was 38,839 (a negative number)
Ask Vol was 719,842 (a positive number)
Cum Delta, using above numbers, was +681,003.
Cum Delta decrease per SC study, using IQFeed data, was -715,000 +/-

What reasons might explain CumDelta, in the above described scenario, being shown as a negative number?

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  #3 (permalink)
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Post a screenshot for clarity.

Mike

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Excuse my ignorance but what is 'SC study'?

Interested to see what you are raising, as CD sometimes works well, other times not at all. Assume you are talking about 5 minute bars, but will find out soon enough. Sadly, do not have AAPL data available to check. Look forward to some screenshots/similar as Mike suggests.

Update: Original message said I would download data, but...

Richard
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Last edited by RichardHK; March 6th, 2013 at 01:22 AM.
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RichardHK View Post
Excuse my ignorance but what is 'SC study'?

sierra chart

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  #6 (permalink)
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RichardHK View Post
Excuse my ignorance but what is 'SC study'?

I will check my Kinetick data soon. Interested to see what you are raising, as CD sometimes works well, other times not at all. Assume you are talking about 5 minute bars, but will find out soon enough.

I trade from 1 minute candles.

SC study refers to the Sierra Chart Cumulative Delta Study - in my case, a running tally of the cumulative deltal for the trading day. The number I reported in my question is the net for that one candle.

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Big Mike View Post
sierra chart

Mike

Thanks Mike. Should have guessed that one.

Richard
Hong Kong
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Big Mike View Post
Post a screenshot for clarity.

Mike

I think the numbers really say it all and submitting my entire set up won't really add any useful data. I'm just trying to wrap my mind around the reason for the positive cumulative delta for the first AAPL candle of today, given the overwhelming bid volume during that candle. Anyone can take a look at their chart, if they have bid/ask studies and tick data, to verify this anomaly. Thanks much.


Last edited by Gedman; March 6th, 2013 at 03:24 AM. Reason: Spell error and additional piece of info.
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Gedman View Post
I trade from 1 minute candles.

SC study refers to the Sierra Chart Cumulative Delta Study - in my case, a running tally of the cumulative deltal for the trading day. The number I reported in my question is the net for that one candle.

Thanks for clarification. If you are looking at a single bar, especially at session start, then you are not going to find much of use. Lost of funds being bought/sold and no direction to trade off. Why don't you reset CD at session start?

The positive number you quote for opening candle obviously carries over from the day before. And the CD by 1pm being negative (even subtracting the large opening figure brought forward) just shows lots of selling throughout day of AAPL, which is what you would expect if stock being dumped.

Two data points do not really help much at all. You need to look at CD trendlines versus price action to interpret what 'might' be happening.

Richard
Hong Kong
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RichardHK View Post
Thanks for clarification. If you are looking at a single bar, especially at session start, then you are not going to find much of use. Lost of funds being bought/sold and no direction to trade off. Why don't you reset CD at session start?

The positive number you quote for opening candle obviously carries over from the day before. And the CD by 1pm being negative (even subtracting the large opening figure brought forward) just shows lots of selling throughout day of AAPL, which is what you would expect if stock being dumped.

Two data points do not really help much at all. You need to look at CD trendlines versus price action to interpret what 'might' be happening.

Richard, my cumulative delta study is set to start fresh each day. It begins in the pre-market, but the number I've reported is the net for just the first candle of the regular session.

The numbers I reported for the first candle of the after market session are also just the bid and ask volume, and cum delta for just that candle.

My purpose in asking the question is more to gain understanding as to what this delta anomaly may signify, rather than how to trade off the first candle.

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