May I please ask about trend lines. Are they also belong to trend indicators. If yes, why you don't mention it here.

Trend lines are not exactly indicators, but rather technical tools. Trend lines are graphical analytical tools, applied by traders without any mathematical formula behind them.

However, you'll be right naming trend lines as indicators if we start speaking about automated trading systems, where even trend lines are drawn by a software.

At this point we won't be covering trend line trading, but you can always find good resources about this topic on the net. Here is the one to start with Forex trend lines.

Hello,
I just get to kow about your website now and found it very useful for beginners...
Kudos to you for a good job...
Please i need your help, i want you to please give me some free eBooks that explained better about Trend Indicators, and the ones that explained better Oscillators.
I will be very happy if you can help me with it.
Help me send it to jidomis(at)yahoo.com
Jyde... Becoming your FX apprentice.

I don't have any particular e-books on these subjects, unfortunately. I'm sorry.
I think browsing through the maze of Forex websites can bring some results.