DEFINITION of 'Touchline'

The highest price that a buyer of a particular security is willing to pay and the lowest price at which a seller is willing to sell, at a given time in the trading day. The touchline therefore specifies the best bid or ask for a particular security at any point in time. Very liquid securities will generally have a narrow bid-ask spread, while illiquid securities will have a wide spread.


For example, if security A has various buyers who are bidding $5, $5.10 and $5.15 for it, the touchline bid price would be $5.15. At the same time, if security A has various sellers at $5.20, $5.30 and $5.35, the touchline ask price would be $5.20. The bid-ask spread on security A is therefore $5.15 (bid) / $5.20 (ask).

  1. Ask

    The price a seller is willing to accept for a security, also ...
  2. Ask Size

    The amount of a security that a market maker is offering to sell ...
  3. Bid Price

    The price a buyer is willing to pay for a security. This is one ...
  4. Best Ask

    The lowest quoted offer price among all those offered by competing ...
  5. Bid

    1. An offer made by an investor, a trader or a dealer to buy ...
  6. Bid-Ask Spread

    The amount by which the ask price exceeds the bid. This is essentially ...
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