Keep getting an error of only 4 bars on chart

[unpronounceable1700]

This is the full error
Error on calling 'OnStateChange': You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

This is my code

OnStateChange
----------------------
Description = @"Enter the description for your new custom Strategy here.";
Name = "Strategy Name";
Calculate = Calculate.OnBarClose;
EntriesPerDirection = 1;
EntryHandling = EntryHandling.AllEntries;
IsExitOnSessionCloseStrategy = true;
ExitOnSessionCloseSeconds = 30;
IsFillLimitOnTouch = true;
MaximumBarsLookBack = MaximumBarsLookBack.TwoHundredFiftySix;
OrderFillResolution = OrderFillResolution.Standard;
Slippage = 0;
StartBehavior = StartBehavior.WaitUntilFlat;
TimeInForce = TimeInForce.Gtc;
TraceOrders = false;
RealtimeErrorHandling = RealtimeErrorHandling.StopCancelClose;
StopTargetHandling = StopTargetHandling.PerEntryExecution;
BarsRequiredToTrade = 20;
=======================
State.Configure
-------------------------
double d = Stochastics(14, 14, 3).D[0];
double k = Stochastics(14, 14, 3).K[0];
=============================
OnBarUpdate
----------------------------
if (CurrentBar < 1) return;

and then just my trade executions

[NinjaTrader_Jesse]

Hello unpronounceable1700,

This is because you are trying to access data in OnStateChange, you need to move that code into OnBarUpdate where bars are actually being processed. OnStateChange is only meant for setting up your script and not for anything that relates to using bar data.

State.Configure
-------------------------
double d = Stochastics(14, 14, 3).D[0];
double k = Stochastics(14, 14, 3).K[0];

[unpronounceable1700]

Hello unpronounceable1700,

This is because you are trying to access data in OnStateChange, you need to move that code into OnBarUpdate where bars are actually being processed. OnStateChange is only meant for setting up your script and not for anything that relates to using bar data.

State.Configure
-------------------------
double d = Stochastics(14, 14, 3).D[0];
double k = Stochastics(14, 14, 3).K[0];

Thank you, it seemed to work. Ran the backtest, but after I tried to run another one just simply changing the date range of the backtest to july - now instead of jan 1-now and it gave me an error of
"An order placed has been ignored since the order was submitted before the strategy property BarsRequiredToTrade had been met"

[NinjaTrader_Jesse]

Hello unpronounceable1700,

That is just a warning letting you know that an order was submitted before the bars required to trade, that defaults to 20 bars. That means your entry condition became true almost immediately when the script started. the bars required to trade is used primarily to prevent trades from being placed while indicators or price data is processed initially. For example if you used a 12 period SMA the value will not be ready until at least 12 bars have processed, if your condition used that SMA and the strategy placed an order incorrectly due to the currently calculating indicator value it will be ignored.