Can you explain to me why before in MQL4 they used the term g_ibuf

[Juan Mateo]

double g_ibuf_104[];

[Keith Watford]

Juan Mateo:
double g_ibuf_104[];

Nobody used that.
When you see something like that it means that the ex4 file has been decompiled.

Do not post decompiled code or you will likely be banned.

[William Roeder]

Ask the real owner of the source code to give it to you or have him fix it for you.

Decompiled code is stolen code. Either you are a thief, a fence, or the receiver of stolen (intellectual) property. Either way, we will not be an accomplice after the fact to that theft.

See also
          Terms of Use of MQL5.community #3.13
          How can I recognize a decompiled code ? - General - MQL5 programming forum - Page 2 #17 (2017)
          134317 - MQL4 programming forum (2011)

If you post decompiled code again, you will likely be banned.

Don't tell us you found it on the 'net: if someone stole your bank details and uploaded them on to the internet, is it OK for everyone to use them because “someone uploaded it, I don't know why I can't use that?”