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Direct MessagesDate/Time: Tue, 23 Apr 2024 16:01:25 +0000
[Programming Help] - Rounding issue
View Count: 686
| [2020-07-06 10:03:10] |
| gfx2trade - Posts: 48 |
|
Hi team, I don't really get why the rounding to tick size doesn't work with the following code... why does the only hard coded value provide a correct rounding number ? avgPrice = sc.RoundToTickSize(PositionData.AveragePrice, 0.01); ServiceLogStr.Format(" Average Price : %f ", avgPrice ); sc.AddMessageToTradeServiceLog(ServiceLogStr, 0); avgPrice = sc.RoundToTickSize(PositionData.AveragePrice, sc.TickSize); ServiceLogStr.Format(" Average Price : %f ", avgPrice ); sc.AddMessageToTradeServiceLog(ServiceLogStr, 0); avgPrice = sc.RoundToTickSize(PositionData.AveragePrice, myTickSize); ServiceLogStr.Format(" Average Price : %f ", avgPrice ); sc.AddMessageToTradeServiceLog(ServiceLogStr, 0); with SCInputRef Input_TickSize = sc.Input[19]; float myTickSize = 0.00; Input_TickSize.Name = "Asset Tick Size"; Input_TickSize.SetFloat(0.01); Input_TickSize.SetDescription("Underlying asset tick size."); myTickSize = Input_TickSize.GetFloat(); |
| [2020-07-06 10:04:27] |
| gfx2trade - Posts: 48 |
|
result in log... Average Price : 176.020000 | 2020-07-06 12:03:36.022 Average Price : 176.019996 | 2020-07-06 12:03:36.022 Average Price : 176.019996 |
| [2020-07-06 15:28:48] |
| User907968 - Posts: 802 |
|
see https://en.wikipedia.org/wiki/Floating-point_arithmetic 0.01 -> double precision floating point sc.TickSize -> single precision floating point Date Time Of Last Edit: 2020-07-06 15:29:41
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| [2020-07-14 16:02:03] |
| gfx2trade - Posts: 48 |
|
thks but it does help. A few lines of codes to highligth the differences would be appreciated |
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