I never define Ticksize in the formula. Make sure you have the contract specifications set up in Symbol -> Information window. Tick size should be set to 0.25. You can take PointValue and Ticksize lines out of the code.
________________________________ From: Gonzaga <gonzag...@yahoo.es> To: amibroker@yahoogroups.com Sent: Wed, November 25, 2009 2:25:10 PM Subject: [amibroker] How do I use ticksize in futures? Hi I'm trying to backtest a system in futures, in mini SP500, and have no experience. I see that I must use the ticksize in order to tell Amibroker the smaller movement of the ticker, in this case 0.25 points. I see that the constant 'tickersize' can obly be used with pre-defined stops or Applystop, not with a user-programmed stop.. Ok. But when I try a backtest, with the code: PositionSize = -2; // use 2% of equity MarginDeposit = 2250; // mini sp RoundLotSize = 1; // this you can set also in the Settings page PointValue = 50; //multiply punto SP TickSize=0.25; //least variation the system buys SP500 at e.g. 1153.37 I thought that Ami should buy at 1153.25 or 1153.50, isn't it??? Is possible to buy the future miniSP at 1153.37??? Thanks in advance..