ActFX > Algorithmic Trading > Writing a strategy

clip0725

In order to access tick chart data, you must declare an object from the TTickHistory class. The tick history will be stored in this object:

var

History:TTickHistory;

You must also add a tick history setting (AddTickHistorySetting) in the procedure OnCreate, and indicate the procedures that will run when a new rate is received. This can be done as follows:

Example:

var

History: TTickHistory;

procedure OnCreate;

begin

AddTickHistorySetting(@History, 'Tick History', 'EURUSD', 100);

History.OnNewRateEvent := @OnNewRate;

end;

procedure OnNewRate;

begin

...

end;

Note that the names of the procedures should be written with the @-prefix.