variable SL TP and TS

1)is it possible linking the level of stop loss and/or take profit, trailing stop to an indicator? (the goal is to change them according to the volatility of the market)
2)How would be the code to perform this task?
3)If 1 is possible, which indicator is the best choose? I’ve thinked about something like standard deviation. This indicator should range form 0 to 1. how can I transform an indicator to have it in that range?

If you answer to all questions you will get the nth holy grail ea :-) to test.

Look into ATR.

Eugenioca, attached is an ATR based trailing stop indicator.

If you want SL, TP and TS levels to be updated automatically for you (i.e. manage trades while you're away from the computer), you would need to code an EA to do this for you. Here is an example, perhaps it comes close to meeting your requirements? If not, a forum search will no doubt find others.

[EDIT] Here is another one.

David

thank you very much for your help, hanover
the 2 eas you refer are very interesting
now i will try to insert in them my indicators and signals
one more question if i can .. i have no idea on how to link atr indicator to my ea

tnx again

I wish I had more time, I'm currently trying to complete 2 other EAs for paying customers.

There's a line of code in your EA that reads:
if(UseTrailingStop && TrailingStop > 0) {

The way the EA builder works, TrailingStop is a number of pips. If you were to insert a line of program code that calculates your ATR (I don't know your formula), and then set TrailingStop equal the number of pips price is currently away from the ATR-based price, all just prior to the line of code that I mentioned, that should work.

e.g. (assuming a long trade) ATR based stop is currently at 1.6655, current price is 1.6677, therefore stop needs to be placed 22 pips away from price, so you would set TrailingStop = 22.

No promises, but if I do manage to find some spare time, I'll try to figure out how to do this, but I'll need to research how the generated code works first.

David