Donchian-channel

I need something like this

QUOTE:
How can I insert the Donchian channel indicator?

Have you tried inserting the Highest indicator and its companion indicator, Lowest?

There's also a DonchianMid indicator to plot a mid-line.

I'm trying to put together this strategy:
donch (200) displacement (1)
Close < donch buy at market
take profit 500
stop loss 1000

What could I be doing wrong?

I only know how to code. I don't use blocks.

But your logic is off. You want to Buy when the Close drops below the Lowest? That's never going to happen.

This is the code I use in other software:

Input
Stop(1000);
Offset(150);
BE(1000);
Alvo(500);

var
vEst, vIFR, vDonchs, vDonchi, sATR: float;
ativaBE: boolean;
candle: integer;

Begin



vDonchs:=DonchianCh(200)|1|;
vDonchi:=DonchianCh(200)|2|;


//ENTRADA

if (position=0) and (close[1]>vDonchi[1]) and (close[0]<vDonchi[1]) then
begin
BuyAtMarket;
ativaBE:=false;
candle:=currentbar;
end;

// SAÍDA

if (IsBought) then

begin

if (high>=(buyprice-BE)) and (currentbar<candle) then ativaBE:=true;
if (ativaBE=true) then
Begin
SellToCoverStop(buyprice, buyprice, buyposition);
end;


//STOPLOSS

SellToCoverStop((buyprice-stop), (buyprice-stop-offset), buyposition);

//STOPGAIN

if (high>=(buyprice+Alvo)) then
Begin
closeposition;
ativaBE:=false;
end;

end;

plot(vDonchs[1]);
plot2(vDonchi[1]);


setplotcolor(3,clred);

end;




I want to buy if the price closes below the low of the 200-period Displacement 1 period

You may get more help if you comment all the lines of your code. For example, what does ... mean? If one is Highest and the other Lowest, which one?

CODE:
vDonchs:=DonchianCh(200)|1|;
vDonchi:=DonchianCh(200)|2|;

Also, this is a short selling strategy, and I know nothing about trading short. But someone else on the forum would.

Can you give more detail on the symbol and timeframe you are trading? I see one screen cap that shows daily bars and another that shows 15 minute bars. Is it ES futures symbol or what?

Se = IF

CANDLESTICK CLOSES < LOWEST 200 (PREVIOUS)

BUY OPEN NEXT CANDLE
TAKE PROFIT 500 POINTS
STOP LOSS 1000 POINTS

TIME FRAME 15 MINUTES

I think I succeeded

Yes that looks good!