how to use indicator ?

hello friends -- forex newbie needs help.how to use indicator in MT4 ?
attached the one hour indicator on MT4 one hour chart ? attached the
4 hour indicator on the 4 hour chart on MT4 ? many thanks.

If you have the mq4 file, save it in your /experts/indicators/ folder, bring it up in the MetaEditor and compile it (hit F5).

Then, it should show up under Custom Indicators in the Navigator window of your MT4 platform. From this window, simply drag the name of the indicator and drop it onto the chart you're interested in.

If you have the eq4 file only, save it in your /experts/indicators/ folder, and activate your MT4 platform afterward. Again, it will show up under Custom Indicators in the MT4 Navigator window, but it will be gray in color. You can still drag/drop the indicator onto your desired chart.

Hello - Thanks. I know how to install custom indicators. What I do not know is how to read the indicator. some indicators are 1 hour indicator - can attached on 4 hours MT4 chart ?

Most indicators make a calculation based on an evaluation of a certain number of bars. You can attach the indicator to any time frame and it will work. It will give you a result based on that time frame.

There are many indicators. If you don't post the indicator I doubt anyone will be able to tell you how to read it.

Envelopes indicator --When the blue line touch the candlestick on the MT4 chart, indicate entry point ? what is the purpose of red line at the bottom ?

I do not use this indicator. There is a difference between explaining how an indicator works and how to use it in a trading system. I can't tell you how to make money using the envelopes indicator.

The theory and formula are explained by MetaQuotes here.
Another description here.

You can attach the indicator to any time frame. If you want to attach to a 1 hour chart try something like deviation = .40 or on a 4 hour chart use a higher deviation maybe .8 using 14 periods for both. I'm just picking these numbers out of my head. You need to test different adjustments on the parameters tab of the properties box. See how they effect the envelope lines on your chart. Visually backtest where you would enter trades.