Update variable at condition

Question

I would like to update a variable (in the below example is new_profit_long) every time a condition is verified.

The following is a simplified example of what I want to achieve:

entry = nz(strategy.opentrades.entry_price(strategy.opentrades - 1))
profit = entry + tp
loss = entry - sl
extra = tp * .5
new_profit = profit

if close > profit
    if close > new_profit
        new_profit := new_profit + extra
    else
        strategy.close("long")
else if close < loss
    strategy.close("long")

Unfortunately, I get this behaviour:

close	entry	(old) new_profit	(new) new_profit	notes
782.7	783.5	783.5	783.5	enter
784.0		783.5	784.5	new_profit changed
784.6		783.5	784.5	new_profit not changed: why?
781.4		783.5	783.5
776.9		783.5	783.5	exit

What's wrong?

Answer 1

Finally, I came up with this solution:

entry = strategy.opentrades.entry_price(strategy.opentrades - 1)
profit = entry + tp
loss = entry - sl
extra = tp * .5

var float new_profit = na
var float old_profit = na

if not new_profit
    new_profit := profit

if close > profit
    if close > new_profit
        old_profit := new_profit
        new_profit := new_profit + extra
    else if close < old_profit
        strategy.close("long")
        new_profit := na
        old_profit := na
else if close < loss
    strategy.close("long")
    new_profit := na
    old_profit := na