A piece of advise

I think the most important part is the probes for 4 gates
Heres the build order

but do remember.. to every build theres a counter

4 gates..

1 chrono on nexues for probes after 10/10

after 12th probe stop making probes start a gateway ASAP

13th probe chrono for the 2nd time

build a assimilator 14th probe

get a pylon after that..

get a zealot

then get a cyber asap and stop probe production at 20th

after 2nd chrono on cyber core make 3 gates asap

win the game

as simple as that!

No worries its really a strong push, alot of toss loses because of this..
haha you can actually expand but I think you need to do your building placement a lil nicer and practice a few force field tricks

I took a screen shot photo to give you a better explanation..

1) I would like to talk about your BO

everything is fine untill your 1st pylon which is outside your main( the pylon which i circled in green)

After that pylon is up what you want is to build a forge and gateway 1st... drop a photon cannon down which i like alot from 4th gate onwards get a robo n slowly transition to collosus depending on what army he has..
2) I would like to talk about building placements

Do see the black line? that is how you want your building to be like. Now look at the maroon/dark red arrow... If you were to make your building placement according to the yellow line.. the zerglings could just run pass your natural and straight to your main base which is the worst scenario we would ever want to put ourself in to losing alot of probes to zergling

By making the wall along the black line.. the opponants are forced to attack the wall before they can engage your army..

at this time.. what you want to do is to chrono boosting your warp gates so that you could warp in more armies...

sounds good?

3) now i would like to guide you how you should FF your opponant..

I like how you used your FF's making an L shape so that your opponant couldnt run away..

but the problem is that your army is too small to take on that army so what i propose is make the FFs infront of the roaches.. this give the opponant two options.. they could either attack the building that are on along black line which i drew earlier or they could retreat...

both situations would favour you  because.. If they attacked your building just follow how i drew the FFs for you, 1st FF is the line infront of their roaches.. 2nd FF is to trap them as they are and your stalkers could attack them and they are forced to attack your structure because they are trap inside...

If they run away its alright because you only used 4ffs.. which is 200 mana and you have many more sentries.. at this point of time what you can do is to chrono boost your warp gates to get more stalkers
thats about it i guess

what i can say is this...
there is various opening for protoss...
the one which i can relate to urs is this: -
- 1 or 3 gate FE into 6/7 gate chargelot with quick upgrades (double forge)... once u get to 2/2, start being agressive and u can transition into double robo colo and hit a timing b4 he can get enuff vikings...
- 1 or 3 gate FE into 6 gate templar tech with single robo for obs... when the terran get ghost, u transition into double robo colo

note: 3rd base timing onwards depend on the damage u dealt and map control... this only work if terran go bio
what u said isn't wrong =p

added note:
chronoboost get worst as the game gets longer whereas mules get better... reason? chrono u need resource to use (how often u see all the korean toss have 0 energy in nexus late game? not often)... terrans on the other hand can sac scv and rely on mules for minerals (the true terran 300food push)... basically chrono boost helps u hit earlier timing/ upgrade advantage and it gets weaker later on especially when bio reach 2/2...