URGENT: Impulse Response Function

[Seeking_Knowledge]

Hello forumers


1) What does one SD Choleski factor shock imply?
meaning is it a value like 0.01 % = 1 % etc

2) Example using IRF = response value of Y is 0.0010 If I divide -0.0010/0.01 = -0.1 (%) is this the percentage change ?

3) Can I from here generalize from here... meaning one SD Choleski factor shock leads to a decrease of 0.1 % in dependent variable on day 4. 

4) I want to induce a 1 % shock, should I choose Residual one unit?

[Seeking_Knowledge]

is it something wrong with my data, why are the standard error lines so wide?

I have transformed to log and using differenced D( X) ......