TAC Buy-Sell

TAC Buy-Sell

It is a professional tool to analyze the volumes of negotiation differentiating
purchases in the market and sales.

The formula is obtained by subtracting the ASK – BID = Delta Bar and dividing it into two components resulting in a histogram:

– Green bar: positive “aggressiveness of buyers”, BID.
– Red Bar: negative “aggressiveness of sellers”, ASK.

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Risk disclosure:

No information on this site is investment advice or a solicitation to buy or sell any financial instrument. Past performance is not indicative of future results. Trading may expose you to risk of loss greater than your deposits and is only suitable for experienced investors who have sufficient financial means to bear such risk.

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  1. Pasquale Fracicone • 282 days ago #

    What is the value of the variable subasta?

    • TAC Bolsa • 282 days ago #


      It is a condition that is used to hide the auction in shares in 5 minutes or Tick as shown in the link.

      For futures or other instruments without auction you have to uncheck the auction option.


    • TAC Bolsa • 282 days ago #

      Another Link of how the volume looks with or without auction “subasta”

  2. dario ti • 276 days ago #

    please can you help me to understand? i know i am wrong:

    Long Histogram = High Volume
    Short HIstogram = Low Volume

    GreenZone = Buyer volume
    RedZone = Seller volume

    Up Histogram = Delta Positive (buyer stronger than seller)
    Down Histogram = Delta Negative (seller stronger than buyer)

    but it is wrong according to the picture, because i see a lot of red up histogram

    • TAC Bolsa • 275 days ago #


      I have already seen the problem and requested that it be removed until an adequate solution is found.

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