you have missing bars in history:

you have missing bars in history:

you can try to use combination of blocks "check trades count" and "no trade nearby" ... also differentiate trades into groups for better management ... grid management is not simple and from my view needs a lot of combined logic things
you must somehow check what was last arrow ...
if last was buy arrow, than you can draw stop arrow,
if last was stop arrow, than nothing will be plot
... but this needs a lot of blocks, and loop
it is not simple
I sent several times this thread to admin ... he is not much active 
yes past signals from on Init is possible, but it was with "loop" -- looping through past candles (their IDs) using arrays, and it is something little complicated but not much ... open that post again and try to understand logic used in that, you must know what are arrays ...
... anyway, start with simplier stuffs and continue test them with adding own things into logic, step after step you will be able to create more complicated things ...
if you want to see history candles only to check, run your EA in visual tester (normally you dont need to use arrays for visual tester, but sometimes maybe yes
depends )
for most simplified solution, are you looking for virtual stop loss?
they can be enabled in project options:

Emergency stops are working as normal SL TP ..
place all blocks into "on Tick" section, on Init runs only once while initializing ...

it is called "enum" ... try search for enum in forum, here exists few examples 
it is bug, admin @fxDreema should repair it 

try block "Bulls in a row"
there is block "Check profit (unrealized)" - try use it ...
use constants (it goes into inputs) or variables ...
https://fxdreema.com/help/working-with/constants-and-variables