3.4 Implement user-defined indicator management system and enhance chart capabilities

- Introduced a comprehensive user indicator management system in `components/charts/indicator_manager.py`, allowing users to create, edit, and manage custom indicators with JSON persistence.
- Added new default indicators in `components/charts/indicator_defaults.py` to provide users with immediate options for technical analysis.
- Enhanced the chart rendering capabilities by implementing the `create_chart_with_indicators` function in `components/charts/builder.py`, supporting both overlay and subplot indicators.
- Updated the main application layout in `app.py` to include a modal for adding and editing indicators, improving user interaction.
- Enhanced documentation to cover the new indicator system, including a quick guide for adding new indicators and detailed usage examples.
- Added unit tests to ensure the reliability and functionality of the new indicator management features.

config/indicators/templates/bollinger_bands_template.json

@@ -0,0 +1,30 @@
+{
+  "name": "Bollinger Bands",
+  "description": "Bollinger Bands volatility indicator",
+  "type": "bollinger_bands",
+  "display_type": "overlay",
+  "default_parameters": {
+    "period": 20,
+    "std_dev": 2.0
+  },
+  "parameter_schema": {
+    "period": {
+      "type": "int",
+      "min": 5,
+      "max": 100,
+      "default": 20,
+      "description": "Period for middle line (SMA)"
+    },
+    "std_dev": {
+      "type": "float",
+      "min": 0.5,
+      "max": 5.0,
+      "default": 2.0,
+      "description": "Standard deviation multiplier"
+    }
+  },
+  "default_styling": {
+    "color": "#6f42c1",
+    "line_width": 1
+  }
+}

config/indicators/templates/ema_template.json

@@ -0,0 +1,22 @@
+{
+  "name": "Exponential Moving Average",
+  "description": "Exponential Moving Average indicator",
+  "type": "ema",
+  "display_type": "overlay",
+  "default_parameters": {
+    "period": 12
+  },
+  "parameter_schema": {
+    "period": {
+      "type": "int",
+      "min": 1,
+      "max": 200,
+      "default": 12,
+      "description": "Period for EMA calculation"
+    }
+  },
+  "default_styling": {
+    "color": "#ff6b35",
+    "line_width": 2
+  }
+}

config/indicators/templates/macd_template.json

@@ -0,0 +1,38 @@
+{
+  "name": "MACD",
+  "description": "Moving Average Convergence Divergence",
+  "type": "macd",
+  "display_type": "subplot",
+  "default_parameters": {
+    "fast_period": 12,
+    "slow_period": 26,
+    "signal_period": 9
+  },
+  "parameter_schema": {
+    "fast_period": {
+      "type": "int",
+      "min": 2,
+      "max": 50,
+      "default": 12,
+      "description": "Fast EMA period"
+    },
+    "slow_period": {
+      "type": "int",
+      "min": 5,
+      "max": 100,
+      "default": 26,
+      "description": "Slow EMA period"
+    },
+    "signal_period": {
+      "type": "int",
+      "min": 2,
+      "max": 30,
+      "default": 9,
+      "description": "Signal line period"
+    }
+  },
+  "default_styling": {
+    "color": "#fd7e14",
+    "line_width": 2
+  }
+}

config/indicators/templates/rsi_template.json

@@ -0,0 +1,22 @@
+{
+  "name": "Relative Strength Index",
+  "description": "RSI oscillator indicator",
+  "type": "rsi",
+  "display_type": "subplot",
+  "default_parameters": {
+    "period": 14
+  },
+  "parameter_schema": {
+    "period": {
+      "type": "int",
+      "min": 2,
+      "max": 50,
+      "default": 14,
+      "description": "Period for RSI calculation"
+    }
+  },
+  "default_styling": {
+    "color": "#20c997",
+    "line_width": 2
+  }
+}

config/indicators/templates/sma_template.json

@@ -0,0 +1,22 @@
+{
+  "name": "Simple Moving Average",
+  "description": "Simple Moving Average indicator",
+  "type": "sma",
+  "display_type": "overlay",
+  "default_parameters": {
+    "period": 20
+  },
+  "parameter_schema": {
+    "period": {
+      "type": "int",
+      "min": 1,
+      "max": 200,
+      "default": 20,
+      "description": "Period for SMA calculation"
+    }
+  },
+  "default_styling": {
+    "color": "#007bff",
+    "line_width": 2
+  }
+}