This code snippet demonstrates how to use conditional transparency in an Exponential Moving Average (EMA) indicator based on specific trading conditions. The transparency feature in ProBuilder allows an indicator to be visible only under certain conditions, enhancing the visual analysis on trading charts.

MyEma = average[20,1](close)
t = 0 //transparency = invisible
If low < MyEma and close > MyEma then
    t = 255
Endif
Return MyEma coloured(0,255,0,t) as “MyEma”

Explanation of the Code:

• Line 1: MyEma = average[20,1](close) – This line calculates the Exponential Moving Average (EMA) of the closing prices over the last 20 periods. The EMA is stored in the variable MyEma.
• Line 2: t = 0 – Initializes the transparency variable t to 0, making the EMA initially invisible on the chart.
• Line 3-5: The If statement checks if the low price of the current period is less than MyEma and the close price is greater than MyEma. If both conditions are true, the transparency t is set to 255, making the EMA fully visible.
• Line 6: Return MyEma coloured(0,255,0,t) as “MyEma” – Returns the EMA value with a color specified by RGB values (0,255,0) which is green, and applies the transparency level stored in t. The label “MyEma” is used to identify this particular plot on the chart.

This approach is particularly useful for traders who want to highlight the EMA only when specific conditions are met, reducing chart clutter and focusing on significant signals.