This code snippet demonstrates how to use the `GRAPHONPRICE` function in ProBuilder to display multiple timeframe indicators on a single price chart. It includes examples of daily and hourly moving averages and Bollinger Bands.

timeframe(daily)
ema20daily = average[20,1]
bolupdaily = BollingerUp[20](close)
boldndaily = BollingerDown[20](close)
timeframe(default)
a = 0
if a>0 then
  buy at market
endif
// --- PLOT MTF INDICATORS ON PRICE CHART
graphonprice ema20daily coloured(200,200,0) as "E"
graphonprice bolupdaily coloured(0,200,0) as "Bollinger Up daily"
graphonprice boldndaily coloured(0,200,0) as "Bollinger Down daily"
TIMEFRAME(Daily,updateonclose)
MediaGiorno = average[50,0](close)
TIMEFRAME(1 hour,updateonclose)
MediaOraria = average[50,0](close)
TIMEFRAME(default)
buy at -close limit //istruzione inutile, ma richiesta da ProBackTest
GraphOnPrice MediaGiorno coloured(255,0,0,255) AS "MediaG"
GraphOnPrice MediaOraria coloured(0,128,0,255) AS "MediaO"

Explanation of the Code:

• Setting Timeframes: The code starts by setting the timeframe to ‘daily’ to calculate daily indicators such as the 20-day exponential moving average (EMA) and Bollinger Bands.
• Calculating Indicators: The `average[20,1]` calculates the 20-day EMA. `BollingerUp[20](close)` and `BollingerDown[20](close)` calculate the upper and lower Bollinger Bands for the daily timeframe.
• Default Timeframe: It then switches back to the default timeframe to check a condition (which is always false in this example) to potentially execute a buy order.
• Graphing on Price Chart: The `graphonprice` function is used to plot these indicators directly on the price chart with specified colors and labels.
• Additional Timeframe Analysis: The code also demonstrates how to switch between different timeframes, here adding a 50-period average for both daily and hourly charts, and plotting these on the price chart.
• Redundant Buy Statement: There’s a redundant buy statement intended to meet specific backtesting tool requirements, illustrating how sometimes code must adapt to tool constraints.

This example is useful for understanding how to manage multiple timeframes and visualize various technical indicators on a single chart using ProBuilder’s capabilities.