Support Board
Date/Time: Sat, 28 Jun 2025 02:25:36 +0000
[Programming Help] - ACSIL - I do not understand how to plot a moving average
View Count: 1571
| [2021-09-16 18:15:55] |
| liquidsquid - Posts: 3 |
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Hello, this might be a dumb question, however, I found it difficult to plot a moving average on a chart. I have a very simple study that calculates the diff between the last traded volume at the ask and at the bid. I am trying to make an SMA out of it, I can plot the diff (I have a DOM opened with the last volume studies), but I can't plot the SMA. #include "sierrachart.h" SCDLLName("SmaTest") SCSFExport scsf_SmaTest(SCStudyInterfaceRef sc) { SCSubgraphRef SubgraphSMA = sc.Subgraph[0]; SCInputRef Input_SMAPeriod = sc.Input[0]; SCFloatArray IndicatorArray; if (sc.SetDefaults) { sc.GraphName = "Sma plot test"; SubgraphSMA.Name = "SMA"; SubgraphSMA.DrawStyle = DRAWSTYLE_LINE; SubgraphSMA.DrawZeros = false; Input_SMAPeriod.Name = "SMA Period"; Input_SMAPeriod.SetInt(10); } int Indicator = sc.GetRecentAskVolumeAtPrice(sc.Ask) - sc.GetRecentBidVolumeAtPrice(sc.Bid); IndicatorArray[IndicatorArray.GetArraySize()] = Indicator; sc.SimpleMovAvg( IndicatorArray, SubgraphSMA, Input_SMAPeriod.GetInt() ); } What am I doing wrong here? I tried to add things like sc.Subgraph[0][sc.Index] = SubgraphSMA; but this is not working. As far as I understand, the SMA is computed, but I can't see how I should plot it. Any help would be really appreciated! Thank you |
| [2021-09-17 04:39:00] |
| User504778 - Posts: 22 |
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Add sc.Subgraph[0][sc.Index] = SubgraphSMA[sc.Index]; |
| [2021-09-17 05:41:08] |
| liquidsquid - Posts: 3 |
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I tried this too but it is not working which is weird... Here is my code, I added the indicator without the SMA #include "sierrachart.h" SCDLLName("SmaTest") SCSFExport scsf_SmaTest(SCStudyInterfaceRef sc) { SCSubgraphRef SubgraphSMA = sc.Subgraph[0]; SCSubgraphRef SubgraphVolume = sc.Subgraph[1]; SCInputRef Input_SMAPeriod = sc.Input[0]; SCFloatArray IndicatorArray; if (sc.SetDefaults) { sc.GraphName = "Sma plot test"; SubgraphSMA.Name = "SMA"; SubgraphSMA.DrawStyle = DRAWSTYLE_LINE; SubgraphSMA.DrawZeros = true; SubgraphVolume.Name = "Volume"; SubgraphVolume.DrawStyle = DRAWSTYLE_LINE; SubgraphVolume.DrawZeros = true; Input_SMAPeriod.Name = "SMA Period"; Input_SMAPeriod.SetInt(3); sc.AutoLoop = 1; } int Indicator = sc.GetRecentAskVolumeAtPrice(sc.Ask) - sc.GetRecentBidVolumeAtPrice(sc.Bid); IndicatorArray[IndicatorArray.GetArraySize()] = Indicator; sc.SimpleMovAvg( IndicatorArray, SubgraphSMA, Input_SMAPeriod.GetInt() ); sc.Subgraph[0][sc.Index] = SubgraphSMA[sc.Index]; sc.Subgraph[1][sc.Index] = Indicator; } Here is a screenshot of my indicator and as you can see, the SMA keeps returning a 0 value... http://www.sierrachart.com/image.php?Image=163185721132.png Date Time Of Last Edit: 2021-09-17 05:41:36
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| [2021-09-17 06:41:46] |
| User907968 - Posts: 840 |
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sc.Subgraph[0][sc.Index] = SubgraphSMA[sc.Index];
This is not the solution, 'sc.Subgrah[0]' and 'SubgraphSMA', refer to the same data -> SCSubgraphRef SubgraphSMA = sc.Subgraph[0]; 'SubgraphSMA' is automatically filled with data when 'sc.SimpleMovAvg' is called, so there is nothing to do there. #include "sierrachart.h" SCDLLName("SmaTest") SCSFExport scsf_SmaTest(SCStudyInterfaceRef sc) { SCSubgraphRef SubgraphSMA = sc.Subgraph[0]; // a - use subgraph for 'indicator' values SCSubgraphRef SubgraphVolume = sc.Subgraph[1]; // or // b - use extra array from SubgraphSMA for 'indicator' values // SCFloatArrayRef IndicatorArray = SubgraphSMA.Arrays[0]; SCInputRef Input_SMAPeriod = sc.Input[0]; if (sc.SetDefaults) { sc.GraphName = "Sma plot test"; SubgraphSMA.Name = "SMA"; SubgraphSMA.DrawStyle = DRAWSTYLE_LINE; SubgraphSMA.DrawZeros = true; SubgraphVolume.Name = "Volume"; SubgraphVolume.DrawStyle = DRAWSTYLE_LINE; SubgraphVolume.DrawZeros = true; Input_SMAPeriod.Name = "SMA Period"; Input_SMAPeriod.SetInt(3); sc.AutoLoop = 1; } int Indicator = sc.GetRecentAskVolumeAtPrice(sc.Ask) - sc.GetRecentBidVolumeAtPrice(sc.Bid); // a SubgraphVolume[sc.Index] = Indicator; sc.SimpleMovAvg( SubgraphVolume, SubgraphSMA, Input_SMAPeriod.GetInt() ); // b //IndicatorArray[sc.Index] = Indicator; //sc.SimpleMovAvg( // IndicatorArray, // SubgraphSMA, // Input_SMAPeriod.GetInt() //); } |
| [2021-09-17 06:52:14] |
| liquidsquid - Posts: 3 |
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Thank you, it works! It definitely makes more sense to pass the SubgraphVolum directly. Thanks!
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