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١١ سبتمبر

This Pine Script code builds an indicator called EMA Crossover with Historical Price Projection that combines two components:

EMA Crossover Strategy:

EMA 9 and EMA 21: The script calculates two exponential moving averages (EMAs) using the ta.ema() function. The crossover between these EMAs generates buy/sell signals.
A bullish crossover (when EMA 9 crosses above EMA 21) signals a buy.
A bearish crossover (when EMA 9 crosses below EMA 21) signals a sell.
These buy/sell signals are visualized on the chart using the plotshape() function with green and red symbols.
Historical Price Projection:

The code projects future prices based on historical price trends. It takes into account growth factors (user-defined drift percentages) to estimate future prices.
Projection Line: It draws a projection line from the anchor point (set by the user) using historical data. The drift factor allows you to control the projection's slope.
Forecasting Area: It shows an optional area around the projected price, adjusting the width with a user-defined growth factor for the forecast's uncertainty.
Key Sections:
Inputs:

User-defined inputs for controlling the growth factor, line styles, and forecasting area settings.
An anchoring point is provided to determine from which bar the price projection should start.
EMA Crossover:

The crossover conditions for EMA 9 and EMA 21 are defined, and the script generates buy and sell signals at those crossovers.
Historical Price Projection:

It stores the percentage changes between bars in barDeltaPercents.
It projects the future price based on these percentages and the user-defined drift factor.
The projected price is visualized using polyline.new(), and a shaded area can be added to show the range of price possibilities.
Execution Logic:

The script runs when the current time is greater than the anchor point.
If the anchor point is too far back in history, it gives a warning via the showInfoPanel function.
As new bars are confirmed, the drift is calculated, and the projection line and area are updated based on historical price changes.
Overall Flow:
It gathers price data up to 500 bars from the anchor point.
Based on the historical price trend, it forecasts the future price with a projection line and an optional shaded area.
The crossover logic for EMA 9 and 21 provides actionable signals on when to buy or sell.