It’s not tricky to make calculations. Starting from 1 lot, which is the default lotsize, you simply have to decrement (or increment) it so that, the first time or when Capital < Capital[1] a new LotSize is used to get 1.01 Capital (Capital + 1%)  when a 1.5% TP is reached, which is repeated until Capital > Capital[1] and LotSize is restored to the default size.

It’s tricky to spot any 1.5% increase in a single trade, before the Daily closing at 213000.

Anyway this is a modified version with new calculations:

// late lunch trade with money management system
 
defparam cumulateorders = false
//defparam flatafter      = 213000
 
once Capital    = 10000
once FirstCap   = Capital
once Equity     = Capital
once OrderSize  = 1
once LotSize    = ordersize
ONCE TP         = 1.5              //1.5%    Take Profit
ONCE Mult       = 1                //1%      Capital Multiplier
ONCE Dec        = 2                //1       number of decimal digits when rounding LotSize calculations
//
ONCE First      = 1
 
td = opendayofweek >= 1 and opendayofweek <= 5
tt = time = 133000
c  = close > exponentialaverage[6](close)

NewTrade = (LongOnMarket AND ShortOnMarket[1]) OR (LongOnMarket[1] AND ShortOnMarket) OR (OnMarket AND Not OnMarket[1])
IF NewTrade THEN
PriceX = TradePrice
PC     = 0
Diff   = 0
First  = 0
ENDIF

IF StrategyProfit <> StrategyProfit[1] THEN
Capital= FirstCap + StrategyProfit
ENDIF

IF StrategyProfit > StrategyProfit[1] THEN
IF Capital > Equity THEN
Equity  = Capital
LotSize = 1
First   = 0
ELSE
First   = 1
ENDIF
ELSIF StrategyProfit < StrategyProfit[1] THEN
First = 1
ENDIF
 
If td and tt and c then
IF First = 1 THEN
LotSize = floor((Equity + (Equity * Mult / 100)) / (Equity + (close * TP / 100 * PipValue)),Dec)
ENDIF
buy lotsize contract at market
endif
 
set target %profit TP