"In order to use this .NET Interactive Notebook and play along with QuanTAlib (outside of making your own app or plugging QuanTAlib into Quantower platform), you will need:\n",
"\n",
"- Installed <a href=\"https://code.visualstudio.com/\" target=\"_blank\">Visual Studio Code</a>\n",
"**For impatient**, here is a simple example of calculating three moving averages - SMA(data), EMA(SMA(data)) and WMA(EMA(SMA(data))) from 10 days of AAPL stock data using QuanTAlib:"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"dotnet_interactive": {
"language": "csharp"
},
"vscode": {
"languageId": "polyglot-notebook"
}
},
"outputs": [],
"source": [
"#r \"nuget:QuanTAlib;\"\n",
"using QuanTAlib;\n",
"\n",
"Yahoo_Feed aapl = new(\"AAPL\", 10);\n",
"TSeries data = aapl.Close;\n",
"SMA_Series sma = new(source: data, period: 5, useNaN: false);\n",
"EMA_Series ema = new(sma, period: 5); // by default, indicators expose all data, no NaN values\n",
"WMA_Series wma = new(ema, 5, useNaN: true); // for the final calculation we can hide early data with NaNs\n",
"QuanTAlib expects that every data item is a tuple (TimeDate t, double v) and TSeries is a list of (t,v) tuples. There are several helpers built into the TSeries class to simplify adding elements:"
"data.Add(item2); // QuanTAlib stamps the (double) with current time\n",
"data.Add(0); // directly adding a number (stamped with current time)\n",
"data.Add((DateTime.Now.AddDays(-3), 10)); // adding a tuple with timestamp 3 days ago\n",
"\n",
"data"
]
},
{
"cell_type": "markdown",
"metadata": {
"dotnet_interactive": {
"language": "csharp"
},
"polyglot_notebook": {
"kernelName": "csharp"
}
},
"source": [
"TSeries list can display only values (without timestamps) or only timestamps (without values) by using `.v` or `.t` properties"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"dotnet_interactive": {
"language": "csharp"
},
"vscode": {
"languageId": "polyglot-notebook"
}
},
"outputs": [],
"source": [
"data.v"
]
},
{
"cell_type": "markdown",
"metadata": {
"dotnet_interactive": {
"language": "csharp"
},
"polyglot_notebook": {
"kernelName": "csharp"
}
},
"source": [
"The last element on the list can be accessed by .Last() or by [^1] - and using `.t` (time) and `.v` (value) properties. Also, casting a TSeries into (double) will return the value of the last element"
"All indicators are just modified TSeries classes; they get all required input during class construction (source of the datafeed, period...) and they automatically subscribe to events of the datafeed. Whenever datafeed gets a new value, indicator will calculate its own value. Indicators are also event publishers, so other indicators can subscribe to their results, chaining indicators together:"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"dotnet_interactive": {
"language": "csharp"
},
"vscode": {
"languageId": "polyglot-notebook"
}
},
"outputs": [],
"source": [
"TSeries t1 = new() {0,1,2,3,4,5,6,7,8,9}; // t1 is loaded with data and activated as a publisher\n",
"EMA_Series t2 = new(t1, 3); // t2 will auto-load all history of t1 and wait for events from t1\n",
"ADD_Series t3 = new(t1, t2); // t3 is an ADDition of t1 and t2 - will also load history and wait for t2 events\n",
"DIV_Series t4 = new(1, t3); // t4 is calculating 1/t3 - and waiting for t3 events\n",
"\n",
"TSeries t5 = new(); // a wild indicator appeared! And it is empty!\n",
"t4.Pub += t5.Sub; // let us add a manual subscription to events coming from t4 - t5 is now listening to t4\n",
"t1.Add(0); // we add one new value to t1 - and trigger the full cascade of calculation! t5 is now full!\n",
"\n",
"t5.v"
]
},
{
"cell_type": "markdown",
"metadata": {
"dotnet_interactive": {
"language": "csharp"
},
"polyglot_notebook": {
"kernelName": "csharp"
}
},
"source": [
"# MACD compounded indicator\n",
"\n",
"With QuanTAlib we can chain indicators together, creating complex compounded indicators. For example, we can create Moving Average Convergence/Divergence (MACD) indicators by chaining all required operations in a sequence:"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"dotnet_interactive": {
"language": "csharp"
},
"vscode": {
"languageId": "polyglot-notebook"
}
},
"outputs": [],
"source": [
"Yahoo_Feed aapl = new(\"AAPL\", 100);\n",
"TSeries close = aapl.Close; // close will get data from history\n",
"EMA_Series slow = new(close,26); // slow gets data from slow through pub-sub eventing\n",
"EMA_Series fast = new(close,12); // fast gets data from slow (via eventing)\n",
"SUB_Series macd = new(fast,slow); // macd is a SUBtraction: fast-slow\n",
"EMA_Series signal = new(macd,9); // signal is EMA of macd\n",
"SUB_Series histogram = new(macd, signal); // histogram is SUBtraction macd-signal\n",
